Statements of Stockholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Dec. 31, 2019	$ 16,042	$ 128,668,583	$ (116,935,112)	$ 11,749,513
Beginning balance, shares at Dec. 31, 2019	16,041,650
Equity compensation		86,042		86,042
Exercise of stock options, net of cashless exercise of 2,451 shares	$ 115	125,172		125,287
Exercise of stock options, net of cashless exercise of shares, shares	115,307
Issuance of shares for vested restricted stock grants	$ 3	(3)
Issuance of shares for vested restricted stock grants, shares	2,670
Net (loss) income			26,602	26,602
Exercise of warrants	$ 50	109,950		110,000
Exercise of warrants, shares	50,000
Ending balance, value at Mar. 31, 2020	$ 16,210	128,989,744	(116,908,510)	12,097,444
Ending balance, shares at Mar. 31, 2020	16,209,627
Beginning balance, value at Dec. 31, 2020	$ 18,410	141,612,140	(119,419,109)	22,211,441
Beginning balance, shares at Dec. 31, 2020	18,410,458
Equity compensation		980,633		980,633
Exercise of stock options, net of cashless exercise of 2,451 shares	$ 182	1,708,764		1,708,946
Exercise of stock options, net of cashless exercise of shares, shares	181,545
Issuance of shares for vested restricted stock grants	$ 2	(2)
Issuance of shares for vested restricted stock grants, shares	1,754
Net (loss) income			(4,624,448)	(4,624,448)
Ending balance, value at Mar. 31, 2021	$ 18,594	$ 144,301,535	$ (124,043,557)	$ 20,276,572
Ending balance, shares at Mar. 31, 2021	18,593,757