Stock-Based Compensation (Details Narrative) - USD ($)
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1 Months Ended |
6 Months Ended |
12 Months Ended |
Jul. 16, 2018 |
Feb. 08, 2018 |
Dec. 14, 2016 |
Jul. 31, 2018 |
May 31, 2018 |
Feb. 28, 2018 |
Mar. 31, 2017 |
Jul. 31, 2018 |
Jan. 31, 2018 |
Jul. 31, 2017 |
Jan. 31, 2017 |
Jul. 31, 2018 |
Jul. 31, 2017 |
Number of shares authorized for issuance to awards granted |
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760,010
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760,010
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760,010
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Purchase price of incentive stock options as a percentage of its fair value |
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85.00%
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Options granted to purchase shares |
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6,286,500
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3,028,536
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Term of stock options |
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1 year 7 months 2 days
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Exercise price |
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$ 1.38
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$ 1.41
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Intrinsic value of options outstanding |
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$ 65,500
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$ 65,500
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$ 65,500
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Intrinsic value of options exercisable |
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37,000
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37,000
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37,000
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Unrecognized stock-based compensation expenses |
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$ 3,900,000
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$ 3,900,000
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$ 3,900,000
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Weighted-average grant date fair value |
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$ 1.24
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$ 0.69
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Dividends rate |
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0.00%
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0.00%
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Restricted Stock Units (RSUs) [Member] |
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Exercise price |
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$ 1.34
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Number of granted shares vested |
312,500
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312,500
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Stock-based compensation expense recognized |
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$ 2,000,000
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$ 462,000
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Number of restricted stock outstanding |
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647,500
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647,500
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1,100,000
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647,500
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1,100,000
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Research And Development Expense [Member] |
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Stock-based compensation expense recognized |
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$ 1,000,000
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$ 1,100,000
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General And Administrative Expense [Member] |
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Stock-based compensation expense recognized |
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$ 5,200,000
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$ 2,500,000
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Maximum [Member] |
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Maturity |
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6 years 6 months
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10 years
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Minimum [Member] |
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Maturity |
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5 years
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2 years 29 days
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Common Stock [Member] |
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Stock issued during period, shares, employee stock purchase plans |
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40,606
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36,420
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Employee, Director and Consultants [Member] | Stock Options [Member] |
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Options granted to purchase shares |
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2,214,500
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Exercise price |
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$ 3.00
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Stock option exchange offer description |
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In the Exchange Offer, an exchange rate of 2-for-1 applied to stock options with an exercise price from $3.00 to $9.99, and an exchange rate of 3-for-1 applied to stock options with an exercise price of $10.00 or more.
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Employee, Director and Consultants [Member] | New Stock Options [Member] |
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Options granted to purchase shares |
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1,070,536
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Mr. O'Connor [Member] | Stock Options [Member] |
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Options granted to purchase shares |
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2,500,000
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Vesting period |
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2 years
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Number of granted shares vested |
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1,000,000
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Mr. O'Connor [Member] | Stock Options One [Member] |
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Options granted to purchase shares |
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500,000
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Number of granted shares vested |
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250,000
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Mr. O'Connor [Member] | Stock Options One [Member] | One Year Anniversary [Member] |
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Number of granted shares vested |
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250,000
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Employees, Directors and Consultants [Member] |
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Stock-based compensation expense recognized |
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$ 3,600,000
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Board of Directors [Member] | Restricted Stock Units (RSUs) [Member] |
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Stock-based compensation expense recognized |
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$ 1,100,000
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Former CFO [Member] | Restricted Stock Units (RSUs) [Member] |
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Options granted to purchase shares |
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625,000
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2011 Plan [Member] |
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Number of shares authorized for issuance to awards granted |
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1,000,000
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1,000,000
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1,000,000
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Maximum shares granted per fiscal year per individual |
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8,500,000
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2011 Plan [Member] | Restricted Stock Units (RSUs) [Member] |
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Options granted to purchase shares |
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35,000
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300,000
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525,000
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Exercise price |
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$ 1.59
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$ 1.64
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Weighted-average grant date fair value |
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$ 1.34
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2011 Plan [Member] | Minimum [Member] |
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Purchase price of incentive stock options as a percentage of its fair value |
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100.00%
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Provisional percentage of outstanding stock owned by stockholders |
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10.00%
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Exercise price as a percentage of fair value of common stock |
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110.00%
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2011 Plan [Member] | Common Stock [Member] | Maximum [Member] |
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Maximum shares granted per fiscal year per individual |
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500,000
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Stock option exercisable period |
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10 years
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2011 Plan [Member] | Employee, Director and Consultants [Member] |
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Employee stock purchase program description |
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The 2011 Plan authorizes a total of 7,500,000 for issuance thereunder, and includes an automatic increase of the number of shares of common stock reserved thereunder on the first business day of each calendar year by the lesser of: (i) 3% of the shares of the Company's common stock outstanding as of the last day of the immediately preceding calendar year; (ii) 1,000,000 shares; or (iii) such lesser number of shares as determined by the Company's Board of Directors.
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Number of shares authorized for issuance to awards granted |
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7,500,000
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7,500,000
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7,500,000
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2011 Plan [Member] | Employees [Member] |
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Options granted to purchase shares |
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5,281,500
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1,841,037
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Term of stock options |
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10 years
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10 years
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Vesting period |
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3 years
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3 years
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2011 Plan [Member] | Employees [Member] | Maximum [Member] |
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Exercise price |
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$ 1.86
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$ 1.94
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2011 Plan [Member] | Employees [Member] | Minimum [Member] |
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Exercise price |
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$ 0.92
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$ 1.11
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2011 Plan [Member] | Director [Member] |
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Options granted to purchase shares |
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300,000
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355,416
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Term of stock options |
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10 years
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10 years
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2011 Plan [Member] | Director [Member] | Maximum [Member] |
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Exercise price |
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$ 1.94
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$ 1.34
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2011 Plan [Member] | Director [Member] | Minimum [Member] |
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Exercise price |
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$ 0.979
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$ 1.29
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2011 Plan [Member] | Consultants [Member] |
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Options granted to purchase shares |
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705,000
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832,083
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Term of stock options |
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10 years
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3 years
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2011 Plan [Member] | Consultants [Member] | Maximum [Member] |
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Exercise price |
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$ 1.88
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$ 2.00
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2011 Plan [Member] | Consultants [Member] | Minimum [Member] |
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Exercise price |
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$ 1.00
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$ 1.29
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ESPP [Member] |
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Number of shares authorized for issuance to awards granted |
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410,903
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410,903
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410,903
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Purchase price of incentive stock options as a percentage of its fair value |
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85.00%
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Stock-based compensation expense recognized |
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$ 16,000
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$ 23,000
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Stock issued during period, shares, employee stock purchase plans |
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500,000
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Discount from market price, offering date |
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15.00%
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Fair market value of unvested shares, percentage |
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15.00%
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ESPP [Member] | Black-Scholes Option Valuation Model [Member] |
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Maturity |
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6 months
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6 months
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6 months
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6 months
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Risk free interest rate |
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1.64%
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1.15%
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0.65%
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0.40%
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Volatility rate |
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97.86%
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62.60%
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132.68%
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96.91%
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Forfeitures percentage |
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0.00%
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0.00%
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0.00%
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0.00%
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Dividends rate |
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0.00%
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0.00%
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0.00%
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0.00%
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ESPP [Member] | July 31, 2016 [Member] | First Offering Period [Member] |
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Shares purchased |
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17,789
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ESPP [Member] | January 31, 2017 [Member] | Second Offering Period [Member] |
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Shares purchased |
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18,631
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ESPP [Member] | July 31, 2017 [Member] | Third Offering Period [Member] |
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Shares purchased |
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21,646
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ESPP [Member] | January 31, 2018 [Member] | Fourth Offering Period [Member] |
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Shares purchased |
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18,960
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ESPP [Member] | July 31, 2018 [Member] | Fifth Offering Period [Member] |
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Shares purchased |
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12,071
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