Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Stockholders' Equity (Unaudited)

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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
Common Stock [Member]
Additional Paid-In Capital [Member]
Warrants [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Deficit [Member]
Total
Balance at Jul. 31, 2018 $ 535 $ 145,749,189 $ 11,271,327 $ (16,024) $ (134,080,821) $ 22,924,206
Balance, shares at Jul. 31, 2018 5,351,290   895,805      
Exercise of common stock options $ 4 539,715 539,719
Exercise of common stock options, shares 40,688        
Common stock issued for employee stock purchase plan 12,671 12,671
Common stock issued for employee stock purchase plan, shares 1,207        
Stock-based compensation expense $ 1 1,391,655 1,391,656
Stock-based compensation expense, shares 5,157        
Tax withholdings paid related to net share settlement of equity awards (24,340) (24,340)
Tax withholdings paid on equity awards (15,185) (15,185)
Tax shares sold to pay for tax withholdings on equity awards 14,649 14,649
Private placement on October 8, 2018, net of issuance costs of $573,189 $ 53 7,446,758 7,446,811
Private placement on October 8, 2018, net of issuance costs of $573,189, shares 533,333        
Cancellation of expired warrants 100,162 $ (100,162)
Cancellation of expired warrants, shares   (2,915)      
Common stock issued for services $ 2 239,822 239,824
Common stock issued for services, shares 18,400        
Modification of equity award $ 2 135,423 135,425
Modification of equity award, shares 17,500        
Dividends declared ($0.00 per share)
Net loss and comprehensive loss 107,900 (7,575,615) (7,467,715)
Balance at Oct. 31, 2018 $ 597 155,590,519 $ 11,171,165 91,876 (141,656,436) 25,197,721
Balance, shares at Oct. 31, 2018 5,967,575   892,890      
Balance at Jul. 31, 2019 $ 1,063 177,656,149 $ 10,809,724 169,037 (164,356,874) 24,279,099
Balance, shares at Jul. 31, 2019 10,633,043   3,631,953      
Stock-based compensation expense $ 1 574,069 574,070
Stock-based compensation expense, shares 11,698        
Tax withholdings paid on equity awards (8,065) (8,065)
Tax shares sold to pay for tax withholdings on equity awards 6,964 6,964
Common stock issued for services $ 4 219,168 219,172
Common stock issued for services, shares 35,687        
Modification of equity award          
Dividends declared ($0.00 per share)
Net loss and comprehensive loss (15,649) (9,760,484) (9,776,133)
Balance at Oct. 31, 2019 $ 1,068 $ 178,448,285 $ 10,809,724 $ 153,388 $ (174,117,358) $ 15,295,107
Balance, shares at Oct. 31, 2019 10,680,428   3,631,953