Consolidated Statement of Changes in Stockholders' Equity - USD ($)	Public Stock Offering [Member] Common Stock [Member]	Public Stock Offering [Member] Additional Paid-in Capital [Member]	Public Stock Offering [Member]	Private Placement [Member] Common Stock [Member]	Private Placement [Member] Additional Paid-in Capital [Member]	Private Placement [Member] Treasury Stock [Member]	Private Placement [Member] Deferred Compensation, Share-based Payments [Member]	Private Placement [Member] Retained Earnings [Member]	Private Placement [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Deferred Compensation, Share-based Payments [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2019										18,224,577
Balance at Dec. 31, 2019										$ 186,656	$ 77,055,273	$ (1,885,452)	$ (5,636,154)	$ (62,151,988)	$ 7,568,335
Issuance of common stock under equity incentive plan (in shares)										1,956,858
Issuance of common stock under equity incentive plan										$ 1,958	2,556,087	0	(1,937,620)	0	620,425
Warrant compensation cost											588,224				588,224
Cashless warrant exercise (in shares)										27,051
Cashless warrant exercise										$ 27	(27)
Reversal of deferred compensation amortization that did not vest (in shares)										(450,000)
Reversal of deferred compensation amortization that did not vest										$ (450)	(791,550)		594,900		(197,100)
Issuance of common stock (in shares)	4,705,883			1,796,407
Issuance of common stock	$ 4,705	$ 7,253,222	$ 7,257,927	$ 1,796	$ 2,998,204				$ 3,000,000
Deferred compensation amortization													1,052,002		1,052,002
Purchase of treasury stock												(280,269)			(280,269)
Net (loss)										$ 0	0	0	0	(2,906,183)	(2,906,183)
Balance (in shares) at Dec. 31, 2020										26,260,776
Balance at Dec. 31, 2020										$ 194,692	89,659,433	(2,165,721)	(5,926,872)	(65,058,171)	16,703,361
Issuance of common stock under equity incentive plan (in shares)										536,878
Issuance of common stock under equity incentive plan										$ 535	2,750,204	0	(2,168,347)	0	582,392
Warrant compensation cost											35,940				35,940
Cashless warrant exercise (in shares)										39,745
Cashless warrant exercise										$ 39	(39)
Reversal of deferred compensation amortization that did not vest (in shares)										(173,111)
Reversal of deferred compensation amortization that did not vest										$ (173)	(345,267)		241,295		(104,145)
Issuance of common stock (in shares)										142,857
Issuance of common stock				$ 142	$ 999,858	$ 0	$ 0	$ 0	$ 1,000,000
Deferred compensation amortization													1,011,729		1,011,729
Purchase of treasury stock												(238,737)			(238,737)
Net (loss)										$ 0	0	0	0	(321,634)	(321,634)
Balance (in shares) at Dec. 31, 2021										26,807,145
Balance at Dec. 31, 2021										$ 195,235	$ 93,100,129	$ (2,404,458)	$ (6,842,195)	$ (65,379,805)	$ 18,668,906