Consolidated Statement of Changes in Stockholders' Equity - USD ($)	Total	Private Placement	Common Stock	Common Stock Private Placement	Additional Paid - In Capital	Additional Paid - In Capital Private Placement	Treasury Stock	Deferred Compensation	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2017			16,874,235
Beginning balance at Dec. 31, 2017	$ 13,123,353		$ 186,299		$ 74,041,083		$ (831,059)	$ (7,012,544)	$ (53,260,426)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (shares)			5,000
Issuance of common stock	7,911		$ 5		7,906
Issuance of common stock, employees, restricted (in shares)			175,000
Issuance of common stock, employees, restricted	0		$ 175		303,575			(303,750)
Issuance of common stock under equity incentive plan (in shares)			142,112
Issuance of common stock under equity incentive plan	355,760		$ 142		355,618
Reversal of deferred compensation amortization that did not vest (in shares)			(66,667)
Reversal of deferred compensation amortization that did not vest	(5,525)		$ (1,060)		(148,540)			144,075
Warrant compensation cost	8,985				8,985
Deferred compensation amortization	901,544							901,544
Purchase of treasury stock	(982,487)						(982,487)
Net (loss)	(3,775,815)								(3,775,815)
Ending balance (in shares) at Dec. 31, 2018			17,129,680
Ending balance at Dec. 31, 2018	9,633,726		$ 185,561		74,568,627		(1,813,546)	(6,270,675)	(57,036,241)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (shares)				769,230
Issuance of common stock		$ 1,793,905		$ 769		$ 1,793,136
Issuance of common stock, employees, restricted (in shares)			175,000
Issuance of common stock, employees, restricted	0		$ 175		272,825			(273,000)
Issuance of common stock under equity incentive plan (in shares)			156,667
Issuance of common stock under equity incentive plan	398,156		$ 157		397,999
Reversal of deferred compensation amortization that did not vest (in shares)			(6,000)
Reversal of deferred compensation amortization that did not vest	0		$ (6)		(13,254)			13,260
Warrant compensation cost	35,940				35,940
Deferred compensation amortization	894,261							894,261
Purchase of treasury stock	(71,906)						(71,906)
Net (loss)	(5,115,747)
Ending balance (in shares) at Dec. 31, 2019			18,224,577
Ending balance at Dec. 31, 2019	$ 7,568,335		$ 186,656		$ 77,055,273		$ (1,885,452)	$ (5,636,154)	$ (62,151,988)