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Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Preferred Stock and Common Stock (Details)

v3.20.2
Stockholders' Equity - Preferred Stock and Common Stock (Details) - USD ($)
 1 Months Ended 12 Months Ended
Jan. 22, 2020
Nov. 30, 2019
Apr. 29, 2015
Dec. 31, 2019
Apr. 30, 2020
Apr. 30, 2019
Jun. 28, 2019
Jun. 27, 2019
Jul. 19, 2018
Stockholders Equity [Line Items] 听 听 听 听 听 听 听 听 听
Common stock, shares authorized (in shares) 听 听 听 听 40,000,000 听 40,000,000 250,000,000 听
Preferred stock, shares authorized (in shares) 听 听 听 听 1,000,000 1,000,000 1,000,000 10,000,000 听
Preferred stock, shares outstanding (in shares) 听 听 听 听 0 0 听 听 听
Preferred stock, shares issued (in shares) 听 听 听 听 0 0 听 听 听
Proceeds from sale of common stock net of underwriter costs $ 17,267,250 听 $ 101,502 听 $ 16,044,879 $ 0 听 听 听
Common stock issued in equity raise (in dollars per share) $ 7.15 听 听 听 听 听 听 听 听
Stock issued during period, value, new issues $ 16,044,879 听 听 听 听 听 听 听 听
Common stock issued for cashless exercise of stock options (in shares) 听 听 听 听 190,559 111,666 听 听 听
Common stock issued for stock options exercised for cash (in shares) 听 听 听 听 363,334 194,276 听 听 听
Common stock issued for cashless warrant exercise (in shares) 听 听 听 听 76,929 119,594 听 听 听
Cashless exercise of warrants (in shares) 听 听 听 听 164,929 218,323 听 听 听
Common stock issued for warrants exercised for cash 听 听 听 听 听 $ 100,000 听 听 听
Over-Allotment Option 听 听 听 听 听 听 听 听 听
Stockholders Equity [Line Items] 听 听 听 听 听 听 听 听 听
Sale of stock, number of shares issued in transaction 315,000 听 听 听 听 听 听 听 听
Common Stock 听 听 听 听 听 听 听 听 听
Stockholders Equity [Line Items] 听 听 听 听 听 听 听 听 听
Common stock issued (in shares) 2,415,000 听 听 听 听 听 听 听 听
Common stock issued in equity raise (in dollars per share) 听 听 听 听 听 听 听 听 $ 7.40
Common stock issued for services (in shares) 听 25,000 听 听 听 听 听 听 听
Amortization of warrant based cost issued for services 听 $ 177,500 听 听 听 听 听 听 听
Common stock issued for cashless exercise of stock options (in shares) 听 听 听 听 76,929 119,594 听 听 听
Common stock issued for stock options exercised for cash (in shares) 听 听 听 听 277,678 56,910 听 听 听
Common stock issued for stock options exercised for cash (in shares) 听 听 听 听 277,678 56,910 听 听 听
Common stock issued for stock options exercised for cash 听 听 听 听 $ 962,650 $ 128,201 听 听 听
Common stock issued for warrants exercised for cash (in shares) 听 听 听 听 听 43,860 听 听 听
Common stock issued for warrants exercised for cash 听 听 听 听 听 $ 44 听 听 听
Common Stock | Chief Financial Officer 听 听 听 听 听 听 听 听 听
Stockholders Equity [Line Items] 听 听 听 听 听 听 听 听 听
Common stock issued (in shares) 听 15,000 听 15,000 听 听 听 听 听
Stock issued during period, value, new issues 听 $ 103,350 听 $ 103,350 听 听 听 听 听
Maximum | Preferred Stock 听 听 听 听 听 听 听 听 听
Stockholders Equity [Line Items] 听 听 听 听 听 听 听 听 听
Preferred stock, shares authorized (in shares) 听 听 听 听 1,000,000 听 听 听 听