Statements of Convertible Preferred Stock and Stockholders' Equity (Unaudited) - USD ($)	Convertible Preferred Stock Series A [Member]	Convertible Preferred Stocks Series B [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Dec. 31, 2019	$ 5,758,190	$ 5,610	$ 68,530	$ 504,211,040	$ (205,999)	$ (481,312,774)	$ 22,766,407
Beginning Balance, Shares at Dec. 31, 2019	23,110	5,610,121	68,529,623
Issuance of common stock			$ 41	(23,891)			(23,850)
Issuance of common stock, Shares			40,816
Share-based compensation			$ 109	722,203			722,312
Share-based compensation, Shares			109,489
Components of net loss						(1,971,531)	(1,971,531)
Employee stock purchase plan			$ 7	32,216			32,223
Employee stock purchase plan, Shares			6,406
Preferred stock conversion	$ (49,163)		$ 354	48,809			49,163
Preferred stock conversion, Shares	(192)		354,447
Ending balance, value at Mar. 31, 2020	$ 5,709,027	$ 5,610	$ 69,041	504,990,377	(205,999)	(483,284,305)	21,574,724
Ending Balance, Shares at Mar. 31, 2020	22,918	5,610,121	69,040,781
Beginning balance, value at Dec. 31, 2020	$ 5,605,323	$ 5,610	$ 73,694	522,709,846	(205,999)	(487,959,233)	34,623,918
Beginning Balance, Shares at Dec. 31, 2020	22,513	5,610,121	73,694,203
Issuance of common stock			$ 156	252,679			252,835
Issuance of common stock, Shares			154,806
Share-based compensation			$ 30	1,370,527			1,370,557
Share-based compensation, Shares			30,250
Components of net loss						(1,532,397)	(1,532,397)
Employee stock purchase plan			$ 6	29,049			29,055
Employee stock purchase plan, Shares			6,003
Preferred stock conversion	$ (26,886)		$ 204	26,682			26,886
Preferred stock conversion, Shares	(105)		204,397
Ending balance, value at Mar. 31, 2021	$ 5,578,437	$ 5,610	$ 74,090	$ 524,388,783	$ (205,999)	$ (489,491,630)	$ 34,770,854
Ending Balance, Shares at Mar. 31, 2021	22,408	5,610,121	74,089,659