CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($)		Total	Preferred Stock	Common Stock	Treasury Stock	Additional Paid in Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2017			1,321,514	27,283,918	(1,070,904)
Beginning balance at Dec. 31, 2017		$ 49,891,809	$ 1,322	$ 29,186	$ (1,649,746)	$ 83,563,208	$ (32,052,161)
Increase (Decrease) in Stockholders' Equity
Exercise of stock options and warrants (in shares)				442,425
Exercise of stock options and warrants		1,097,033		$ 441		1,096,592
Stock-based compensation (in shares)				282,394
Stock-based compensation		628,139		$ 282		627,857
Non cash compensation (in shares)				129,865
Non-cash compensation		200,002		$ 131		199,871
Stock dividends	[1]			$ 80		257,222	(257,302)
Purchase of treasury stock (in shares)				(182,201)	182,201
Purchase of treasury stock		(466,894)			$ (466,894)
Net income		11,004,241					11,004,241
Ending balance (in shares) at Dec. 31, 2018			1,321,514	27,956,401	(1,253,105)
Ending balance at Dec. 31, 2018		62,354,330	$ 1,322	$ 30,120	$ (2,116,640)	85,744,750	(21,305,222)
Increase (Decrease) in Stockholders' Equity
Exercise of stock options and warrants (in shares)				487,802
Exercise of stock options and warrants		447,954		$ 488		447,466
Stock-based compensation (in shares)				16,286
Stock-based compensation		1,544,156		$ 16		1,544,140
Stock dividends (in shares)	[1]			770,454
Stock dividends	[1]			$ 60		285,390	(285,450)
Preferred stock to common stock conversion (in shares)			(1,321,514)	1,321,514
Preferred stock to common stock conversion			$ (1,322)	$ 1,322
Forfeitures of restricted stock grants (in shares)				(16,666)
Forfeitures of restricted stock grants				$ (157)		157
Purchase of treasury stock (in shares)				(386,686)	386,686
Purchase of treasury stock		(2,220,467)			$ (2,220,467)
Net income		5,342,545					5,342,545
Ending balance (in shares) at Dec. 31, 2019			0	30,149,105	(1,639,791)
Ending balance at Dec. 31, 2019		$ 67,468,518	$ 0	$ 31,849	$ (4,337,107)	$ 88,021,903	$ (16,248,127)

[1] The stock dividends payable in connection with the Series A Convertible Preferred Stock were issued at the request of Carilion. See Note 11 - Stockholders' Equity for more information.