Condensed Statements of Stockholders' Equity (Deficit) (Unaudited) - USD ($)	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2019	$ 4,380,545	$ 2,443	$ 90,108,492	$ (85,730,390)
Beginning Balance, Shares at Dec. 31, 2019		24,431,914
Stock-based compensation expense	310,162		310,162
Issuance of common stock from employee stock purchase plan	21,250	$ 3	21,247
Issuance of common stock from employee stock purchase plan, shares		25,000
Net loss	(1,790,309)			(1,790,309)
Ending Balance at Mar. 31, 2020	2,921,648	$ 2,446	90,439,901	(87,520,699)
Ending Balance, Shares at Mar. 31, 2020		24,456,914
Beginning Balance at Dec. 31, 2019	4,380,545	$ 2,443	90,108,492	(85,730,390)
Beginning Balance, Shares at Dec. 31, 2019		24,431,914
Net loss	(10,886,809)
Ending Balance at Sep. 30, 2020	(1,923,415)	$ 2,633	94,691,151	(96,617,199)
Ending Balance, Shares at Sep. 30, 2020		26,332,122
Beginning Balance at Mar. 31, 2020	2,921,648	$ 2,446	90,439,901	(87,520,699)
Beginning Balance, Shares at Mar. 31, 2020		24,456,914
Stock-based compensation expense	362,955		362,955
Issuance of common stock, net	3,309,116	$ 140	3,308,976
Issuance of common stock, shares net		1,395,855
Issuance of common stock from warrant exercises		$ 15	(15)
Issuance of common stock from warrant exercise, shares		158,494
Net loss	(6,967,395)			(6,967,395)
Ending Balance at Jun. 30, 2020	(373,676)	$ 2,601	94,111,817	(94,488,094)
Ending Balance, Shares at Jun. 30, 2020		26,011,263
Stock-based compensation expense	478,574		478,574
Issuance of common stock from stock option exercises	2,627	$ 1	2,626
Issuance of common stock from stock option exercise, shares		4,237
Issuance of common stock from employee stock purchase plan	98,165	$ 9	98,156
Issuance of common stock from employee stock purchase plan, shares		93,491
Issuance of common stock from warrant exercises		$ 22	(22)
Issuance of common stock from warrant exercise, shares		223,131
Net loss	(2,129,105)			(2,129,105)
Ending Balance at Sep. 30, 2020	(1,923,415)	$ 2,633	94,691,151	(96,617,199)
Ending Balance, Shares at Sep. 30, 2020		26,332,122
Beginning Balance at Dec. 31, 2020	$ (3,214,623)	$ 2,662	95,667,776	(98,885,061)
Beginning Balance, Shares at Dec. 31, 2020	26,621,954	26,621,954
Stock-based compensation expense	$ 561,348		561,348
Issuance of common stock, net	13,070,154	$ 575	13,069,579
Issuance of common stock, shares net		5,750,000
Net loss	(2,605,495)			(2,605,495)
Ending Balance at Mar. 31, 2021	7,811,384	$ 3,237	109,298,703	(101,490,556)
Ending Balance, Shares at Mar. 31, 2021		32,371,954
Beginning Balance at Dec. 31, 2020	$ (3,214,623)	$ 2,662	95,667,776	(98,885,061)
Beginning Balance, Shares at Dec. 31, 2020	26,621,954	26,621,954
Net loss	$ (6,865,590)
Ending Balance at Sep. 30, 2021	$ 4,773,256	$ 3,266	110,520,641	(105,750,651)
Ending Balance, Shares at Sep. 30, 2021	32,656,480	32,656,480
Beginning Balance at Mar. 31, 2021	$ 7,811,384	$ 3,237	109,298,703	(101,490,556)
Beginning Balance, Shares at Mar. 31, 2021		32,371,954
Stock-based compensation expense	399,411		399,411
Issuance of common stock from stock option exercises	45,454	$ 7	45,447
Issuance of common stock from stock option exercise, shares		67,426
Net loss	(2,290,643)			(2,290,643)
Ending Balance at Jun. 30, 2021	5,965,606	$ 3,244	109,743,561	(103,781,199)
Ending Balance, Shares at Jun. 30, 2021		32,439,380
Stock-based compensation expense	463,995		463,995
Issuance of common stock, net	313,107	$ 22	313,085
Issuance of common stock, shares net		217,100
Net loss	(1,969,452)			(1,969,452)
Ending Balance at Sep. 30, 2021	$ 4,773,256	$ 3,266	$ 110,520,641	$ (105,750,651)
Ending Balance, Shares at Sep. 30, 2021	32,656,480	32,656,480