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Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
Total
Common Stock
Additional Paid-In Capital
Treasury Stock
Accumulated Deficit
Beginning balance at Apr. 30, 2018 $ 33,733,591 $ 18,334 $ 66,557,005 $ (70,000) $ (32,771,748)
Beginning balance (in shares) at Apr. 30, 2018 Ìý 18,333,521 Ìý Ìý Ìý
Increase (Decrease) in Stockholders' Equity [Roll Forward] Ìý Ìý Ìý Ìý Ìý
Stock-based compensation 515,291 Ìý 515,291 Ìý Ìý
Common stock issued for cashless stock options exercised 0 $ 31 (31) Ìý Ìý
Common stock issued for cashless stock options exercised (in shares) Ìý 30,764 Ìý Ìý Ìý
Common stock issued for stock options exercised for cash 60,102 $ 26 60,076 Ìý Ìý
Common stock issued for stock options exercised for cash (in shares) Ìý 26,807 Ìý Ìý Ìý
Purchase of treasury stock, net of broker fees (7,370,000) Ìý Ìý (7,370,000) Ìý
Re-sale of treasury stock, net of broker fees 7,370,000 Ìý Ìý 7,370,000 Ìý
Fees associated with equity raise (29,832) Ìý (29,832) Ìý Ìý
Net loss (5,312,354) Ìý Ìý Ìý (5,312,354)
Ending balance at Oct. 31, 2018 28,966,798 $ 18,391 67,102,509 (70,000) (38,084,102)
Ending balance (in shares) at Oct. 31, 2018 Ìý 18,391,092 Ìý Ìý Ìý
Beginning balance at Jul. 31, 2018 31,084,276 $ 18,341 66,744,959 (70,000) (35,609,024)
Beginning balance (in shares) at Jul. 31, 2018 Ìý 18,341,440 Ìý Ìý Ìý
Increase (Decrease) in Stockholders' Equity [Roll Forward] Ìý Ìý Ìý Ìý Ìý
Stock-based compensation 305,315 Ìý 305,315 Ìý Ìý
Common stock issued for cashless stock options exercised 0 $ 26 (26) Ìý Ìý
Common stock issued for cashless stock options exercised (in shares) Ìý 25,534 Ìý Ìý Ìý
Common stock issued for stock options exercised for cash 52,285 $ 24 52,261 Ìý Ìý
Common stock issued for stock options exercised for cash (in shares) Ìý 24,118 Ìý Ìý Ìý
Net loss (2,475,078) Ìý Ìý Ìý (2,475,078)
Ending balance at Oct. 31, 2018 28,966,798 $ 18,391 67,102,509 (70,000) (38,084,102)
Ending balance (in shares) at Oct. 31, 2018 Ìý 18,391,092 Ìý Ìý Ìý
Beginning balance at Apr. 30, 2019 26,461,428 $ 18,666 68,562,727 (70,000) (42,049,965)
Beginning balance (in shares) at Apr. 30, 2019 Ìý 18,665,551 Ìý Ìý Ìý
Increase (Decrease) in Stockholders' Equity [Roll Forward] Ìý Ìý Ìý Ìý Ìý
Common stock issued for cashless stock options exercised (in shares) Ìý 101,894 Ìý Ìý Ìý
Common stock issued for stock options exercised for cash 45,190 Ìý Ìý Ìý Ìý
Common stock issued for stock options exercised for cash (in shares) Ìý 21,876 Ìý Ìý Ìý
Common stock issued for cashless warrant exercise (in shares) Ìý 19,403 Ìý Ìý Ìý
Ending balance at Jul. 31, 2019 24,969,790 $ 18,914 69,146,123 (70,000) (44,125,247)
Ending balance (in shares) at Jul. 31, 2019 Ìý 18,913,527 Ìý Ìý Ìý
Beginning balance at Apr. 30, 2019 26,461,428 $ 18,666 68,562,727 (70,000) (42,049,965)
Beginning balance (in shares) at Apr. 30, 2019 Ìý 18,665,551 Ìý Ìý Ìý
Increase (Decrease) in Stockholders' Equity [Roll Forward] Ìý Ìý Ìý Ìý Ìý
Stock-based compensation 889,484 Ìý 889,484 Ìý Ìý
Common stock issued for cashless stock options exercised 0 $ 182 (182) Ìý Ìý
Common stock issued for cashless stock options exercised (in shares) Ìý 182,207 Ìý Ìý Ìý
Common stock issued for stock options exercised for cash 237,713 $ 113 237,600 Ìý Ìý
Common stock issued for stock options exercised for cash (in shares) Ìý 112,826 Ìý Ìý Ìý
Common stock issued for cashless warrant exercise 0 $ 77 (77) Ìý Ìý
Common stock issued for cashless warrant exercise (in shares) Ìý 76,929 Ìý Ìý Ìý
Amortization of warrant based cost 18,565 Ìý 18,565 Ìý Ìý
Amortization of restricted stock issued for services 73,350 Ìý 73,350 Ìý Ìý
Restricted Stock Issued for Services, subject to vesting 0 $ 104 (104) Ìý Ìý
Restricted Stock Issued for Services, subject to vesting (in shares) Ìý 104,803 Ìý Ìý Ìý
Net loss (2,713,450) Ìý Ìý Ìý (2,713,450)
Ending balance at Oct. 31, 2019 24,967,090 $ 19,142 69,781,363 (70,000) (44,763,415)
Ending balance (in shares) at Oct. 31, 2019 Ìý 19,142,316 Ìý Ìý Ìý
Beginning balance at Jul. 31, 2019 24,969,790 $ 18,914 69,146,123 (70,000) (44,125,247)
Beginning balance (in shares) at Jul. 31, 2019 Ìý 18,913,527 Ìý Ìý Ìý
Increase (Decrease) in Stockholders' Equity [Roll Forward] Ìý Ìý Ìý Ìý Ìý
Stock-based compensation 391,067 Ìý 391,067 Ìý Ìý
Common stock issued for cashless stock options exercised 0 $ 80 (80) Ìý Ìý
Common stock issued for cashless stock options exercised (in shares) Ìý 80,313 Ìý Ìý Ìý
Common stock issued for stock options exercised for cash 192,522 $ 90 192,432 Ìý Ìý
Common stock issued for stock options exercised for cash (in shares) Ìý 90,950 Ìý Ìý Ìý
Common stock issued for cashless warrant exercise 0 $ 58 (58) Ìý Ìý
Common stock issued for cashless warrant exercise (in shares) Ìý 57,526 Ìý Ìý Ìý
Amortization of warrant based cost 9,125 Ìý 9,125 Ìý Ìý
Amortization of restricted stock issued for services 42,754 Ìý 42,754 Ìý Ìý
Net loss (638,168) Ìý Ìý Ìý (638,168)
Ending balance at Oct. 31, 2019 $ 24,967,090 $ 19,142 $ 69,781,363 $ (70,000) $ (44,763,415)
Ending balance (in shares) at Oct. 31, 2019 Ìý 19,142,316 Ìý Ìý Ìý