Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
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
Stock-based compensation	0	103,130	0	103,130
Dividend declared	$ 0	0	(494)	(494)
401(k) stock match (in shares)	6,575
401(k) stock match	$ 66	90,341	0	90,407
Issuance of deferred stock awards (in shares)	6,701
Issuance of deferred stock awards	$ 67	(26,015)	0	(25,948)
Net income	$ 0	0	551,493	551,493
Exercise of stock options (in shares)	3,654
Exercise of stock options	$ 36	48,562	0	48,598
Balance (in shares) at Mar. 31, 2021	4,764,942
Balance at Mar. 31, 2021	$ 47,649	23,847,636	28,165,086	52,060,371
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
Stock-based compensation	0	104,927	0	104,927
Dividend declared	$ 0	0	(675,872)	(675,872)
401(k) stock match (in shares)	7,611
401(k) stock match	$ 76	156,634	0	156,710
Issuance of deferred stock awards (in shares)	19,601
Issuance of deferred stock awards	$ 196	(212,055)	0	(211,859)
Net income	$ 0	0	1,773,913	1,773,913
Balance (in shares) at Mar. 31, 2022	4,839,297
Balance at Mar. 31, 2022	$ 48,393	$ 24,944,077	$ 40,508,575	$ 65,501,045