Statements of Changes in Stockholders' Equity - USD ($)	Total	Series B – F Convertible Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Management Incentive [Member]	Management Incentive [Member] Common Stock	Management Incentive [Member] Additional Paid-In Capital
Beginning Balance at Dec. 31, 2017	$ 5,017,389	$ 30	$ 27	$ 196,355,386	$ (191,338,054)
Beginning Balance (in shares) at Dec. 31, 2017		29,479.98	270,590
Stock-based compensation expense	446,077			446,077
Conversion of Stock, Shares Converted		11,966.35
Conversion of Stock, Amount Converted		$ (12)		(32)
Issuance of common stock upon conversion of preferred stock	0		$ 44
Stock Issued During Period, Shares, Other							21,479
Stock Issued During Period, Value, Other						$ 294,264	$ 2	$ 294,262
Issuance of common stock upon conversion of preferred stock (in shares)			(443,680)
Issuance of common stock under employees stock purchase plan	18,618		$ 1	18,617
Issuance of common stock under employee stock purchase plan (in shares)			2,280
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	297,858				297,858
Net income (loss)	23,605				23,605
Ending Balance at Dec. 31, 2018	6,097,811	$ 18	$ 74	197,114,310	(191,016,591)
Ending Balance (in shares) at Dec. 31, 2018		17,513.63	738,029
Conversion of Stock, Shares Converted		17,313.63
Conversion of Stock, Amount Converted		$ (17)		(48)
Issuance of common stock upon conversion of preferred stock	0		$ 65
Issuance of common stock upon conversion of preferred stock (in shares)			(658,314)
Issuance of common stock under employees stock purchase plan	15,106		$ 1	15,105
Issuance of common stock under employee stock purchase plan (in shares)			4,331
Net income (loss)	(3,773,014)				(3,773,014)
Ending Balance at Dec. 31, 2019	$ 2,530,234	$ 1	$ 140	$ 197,319,698	$ (194,789,605)
Ending Balance (in shares) at Dec. 31, 2019		200	1,400,674