CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2017	$ 62,147,730	$ 15,302	$ 158,867,600	$ (96,735,172)
Beginning Balance, Shares at Dec. 31, 2017		15,302,455
Stock-based compensation	793,589		793,589
Shares issued for Employee Stock Purchase Plan options, Value	40,380	$ 27	40,353
Shares issued for Employee Stock Purchase Plan options, Shares		26,415
Net loss	(2,438,981)			(2,438,981)
Ending Balance at Dec. 31, 2018	60,542,718	$ 15,329	159,701,542	(99,174,153)
Ending Balance, Shares at Dec. 31, 2018		15,328,870
Stock-based compensation	1,085,906		1,085,906
Shares issued for Employee Stock Purchase Plan options, Value	70,668	$ 44	70,624
Shares issued for Employee Stock Purchase Plan options, Shares		44,035
Net loss	(55,240)			(55,240)
Ending Balance at Dec. 31, 2019	$ 61,644,052	$ 15,373	$ 160,858,072	$ (99,229,393)
Ending Balance, Shares at Dec. 31, 2019		15,372,905