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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] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Common stock, shares authorized (in shares) Ìý Ìý Ìý Ìý 40,000,000 Ìý 40,000,000 250,000,000 Ìý
Preferred stock, shares authorized (in shares) Ìý Ìý Ìý Ìý 1,000,000 1,000,000 1,000,000 10,000,000 Ìý
Preferred stock, shares outstanding (in shares) Ìý Ìý Ìý Ìý 0 0 Ìý Ìý Ìý
Preferred stock, shares issued (in shares) Ìý Ìý Ìý Ìý 0 0 Ìý Ìý Ìý
Proceeds from sale of common stock net of underwriter costs $ 17,267,250 Ìý $ 101,502 Ìý $ 16,044,879 $ 0 Ìý Ìý Ìý
Common stock issued in equity raise (in dollars per share) $ 7.15 Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Stock issued during period, value, new issues $ 16,044,879 Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Common stock issued for cashless exercise of stock options (in shares) Ìý Ìý Ìý Ìý 190,559 111,666 Ìý Ìý Ìý
Common stock issued for stock options exercised for cash (in shares) Ìý Ìý Ìý Ìý 363,334 194,276 Ìý Ìý Ìý
Common stock issued for cashless warrant exercise (in shares) Ìý Ìý Ìý Ìý 76,929 119,594 Ìý Ìý Ìý
Cashless exercise of warrants (in shares) Ìý Ìý Ìý Ìý 164,929 218,323 Ìý Ìý Ìý
Common stock issued for warrants exercised for cash Ìý Ìý Ìý Ìý Ìý $ 100,000 Ìý Ìý Ìý
Over-Allotment Option Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Stockholders Equity [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Sale of stock, number of shares issued in transaction 315,000 Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Common Stock Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Stockholders Equity [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Common stock issued (in shares) 2,415,000 Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Common stock issued in equity raise (in dollars per share) Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý $ 7.40
Common stock issued for services (in shares) Ìý 25,000 Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Amortization of warrant based cost issued for services Ìý $ 177,500 Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Common stock issued for cashless exercise of stock options (in shares) Ìý Ìý Ìý Ìý 76,929 119,594 Ìý Ìý Ìý
Common stock issued for stock options exercised for cash (in shares) Ìý Ìý Ìý Ìý 277,678 56,910 Ìý Ìý Ìý
Common stock issued for stock options exercised for cash (in shares) Ìý Ìý Ìý Ìý 277,678 56,910 Ìý Ìý Ìý
Common stock issued for stock options exercised for cash Ìý Ìý Ìý Ìý $ 962,650 $ 128,201 Ìý Ìý Ìý
Common stock issued for warrants exercised for cash (in shares) Ìý Ìý Ìý Ìý Ìý 43,860 Ìý Ìý Ìý
Common stock issued for warrants exercised for cash Ìý Ìý Ìý Ìý Ìý $ 44 Ìý Ìý Ìý
Common Stock | Chief Financial Officer Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Stockholders Equity [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Common stock issued (in shares) Ìý 15,000 Ìý 15,000 Ìý Ìý Ìý Ìý Ìý
Stock issued during period, value, new issues Ìý $ 103,350 Ìý $ 103,350 Ìý Ìý Ìý Ìý Ìý
Maximum | Preferred Stock Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Stockholders Equity [Line Items] Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý
Preferred stock, shares authorized (in shares) Ìý Ìý Ìý Ìý 1,000,000 Ìý Ìý Ìý Ìý