Statements of Stockholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2018	$ 15,639	$ 127,290,467	$ (114,386,401)	$ 12,919,705
Balance, shares at Dec. 31, 2018	15,638,765
Stock-based compensation expense		442,781		442,781
Exercise of stock options, net of cashless exercise of shares	$ 58	63,192		63,250
Exercise of stock options, net of cashless exercise of shares, shares	58,008
Exercise of warrants	$ 93	204,190		204,283
Exercise of warrants, shares	92,856
Issuance of shares for restricted stock grants	$ 2	(2)
Issuance of shares for restricted stock grants, shares	2,000
Net loss			(2,086,668)	(2,086,668)
Balance at Jun. 30, 2019	$ 15,792	128,000,628	(116,473,069)	11,543,351
Balance, shares at Jun. 30, 2019	15,791,629
Balance at Mar. 31, 2019	$ 15,639	127,660,206	(115,599,392)	12,076,453
Balance, shares at Mar. 31, 2019	15,638,765
Stock-based compensation expense		73,042		73,042
Exercise of stock options, net of cashless exercise of shares	$ 58	63,192		63,250
Exercise of stock options, net of cashless exercise of shares, shares	58,008
Exercise of warrants	$ 93	204,190		204,283
Exercise of warrants, shares	92,856
Issuance of shares for restricted stock grants	$ 2	(2)
Issuance of shares for restricted stock grants, shares	2,000
Exercise of stock options
Exercise of stock options, shares
Net loss			(873,677)	(873,677)
Balance at Jun. 30, 2019	$ 15,792	128,000,628	(116,473,069)	11,543,351
Balance, shares at Jun. 30, 2019	15,791,629
Balance at Dec. 31, 2019	$ 16,042	128,668,583	(116,935,112)	11,749,513
Balance, shares at Dec. 31, 2019	16,041,650
Stock-based compensation expense		189,752		189,752
Exercise of stock options, net of cashless exercise of shares	$ 147	139,111		139,258
Exercise of stock options, net of cashless exercise of shares, shares	146,957
Exercise of warrants	$ 50	109,950		110,000
Exercise of warrants, shares	50,000
Issuance of shares for restricted stock grants	$ 13	(13)
Issuance of shares for restricted stock grants, shares	12,995
Issuance of common stock, net of costs	$ 1,769	10,567,698		10,569,467
Issuance of common stock, net of costs, shares	1,769,230
Settlement of executive bonuses with issuance of restricted stock units	$ 9	53,451		53,460
Settlement of executive bonuses with issuance of restricted stock units, shares	9,462
Shares forfeited in exchange for withholding taxes	$ (2)	(13,335)		(13,337)
Shares forfeited in exchange for withholding taxes, shares	(2,012)
Net loss			(733,671)	(733,671)
Balance at Jun. 30, 2020	$ 18,028	139,715,197	(117,668,783)	22,064,442
Balance, shares at Jun. 30, 2020	18,028,282
Balance at Mar. 31, 2020	$ 16,210	128,989,744	(116,908,510)	12,097,444
Balance, shares at Mar. 31, 2020	16,209,627
Stock-based compensation expense		103,710		103,710
Exercise of stock options, net of cashless exercise of shares	$ 32	13,939		13,971
Exercise of stock options, net of cashless exercise of shares, shares	31,650
Issuance of shares for restricted stock grants	$ 10	(10)
Issuance of shares for restricted stock grants, shares	10,325
Issuance of common stock, net of costs	$ 1,769	10,567,698		10,569,467
Issuance of common stock, net of costs, shares	1,769,230
Settlement of executive bonuses with issuance of restricted stock units	$ 9	53,451		53,460
Settlement of executive bonuses with issuance of restricted stock units, shares	9,462
Shares forfeited in exchange for withholding taxes	$ (2)	(13,335)		(13,337)
Shares forfeited in exchange for withholding taxes, shares	(2,012)
Net loss			(760,273)	(760,273)
Balance at Jun. 30, 2020	$ 18,028	$ 139,715,197	$ (117,668,783)	$ 22,064,442
Balance, shares at Jun. 30, 2020	18,028,282