Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2019	4,644,522
Balance at Dec. 31, 2019	$ 46,445	$ 22,733,933	$ 26,635,732	$ 49,416,110
Exercise of stock options (in shares)	24,250			24,250
Exercise of stock options	$ 242	200,548	0	$ 200,790
Other share retirements (in shares)	(9,920)
Other share retirements	$ (99)	(44,587)	(79,512)	(124,198)
Stock-based compensation	0	468,832	0	468,832
Dividend distribution	$ 0	0	(4,147)	(4,147)
401(K) stock match (in shares)	34,625
401(K) stock match	$ 346	371,086	0	371,432
Issuance of deferred stock awards (in shares)	45,865
Issuance of deferred stock awards	$ 459	(177,960)	0	$ (177,501)
Shares issued under Employee Stock Purchase Plan (in shares)	8,670			8,670
Shares issued under Employee Stock Purchase Plan	$ 87	79,766	0	$ 79,853
Net income	$ 0	0	1,062,014	1,062,014
Balance (in shares) at Dec. 31, 2020	4,748,012
Balance at Dec. 31, 2020	$ 47,480	23,631,618	27,614,087	$ 51,293,185
Exercise of stock options (in shares)	3,654			3,654
Exercise of stock options	$ 37	48,562	0	$ 48,599
Stock-based compensation	0	548,282	0	548,282
Dividend distribution	$ 0	0	(1,706)	(1,706)
401(K) stock match (in shares)	33,998
401(K) stock match	$ 340	557,056	0	557,396
Issuance of deferred stock awards (in shares)	14,597
Issuance of deferred stock awards	$ 146	(26,094)	0	$ (25,948)
Shares issued under Employee Stock Purchase Plan (in shares)	11,824			11,824
Shares issued under Employee Stock Purchase Plan	$ 118	135,147	0	$ 135,265
Net income	$ 0	0	11,798,153	11,798,153
Balance (in shares) at Dec. 31, 2021	4,812,085
Balance at Dec. 31, 2021	$ 48,121	$ 24,894,571	$ 39,410,534	$ 64,353,226