CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (loss) [Member]
Beginning Balances at Dec. 31, 2020	$ 59,533	$ 130	$ 25,509	$ 38,620	$ (4,187)	$ (539)
Net income	1,194			1,194
Other comprehensive gain (loss), net of taxes	7					7
Stock-based compensation expense	621		621
Stock options exercised	101		101
Ending Balances at Mar. 31, 2021	61,456	130	26,231	39,814	(4,187)	(532)
Beginning Balances at Dec. 31, 2020	59,533	130	25,509	38,620	(4,187)	(539)
Net income	8,338
Other comprehensive gain (loss), net of taxes	(57)
Ending Balances at Sep. 30, 2021	70,171	131	27,865	46,958	(4,187)	(596)
Beginning Balances at Mar. 31, 2021	61,456	130	26,231	39,814	(4,187)	(532)
Net income	3,738			3,738
Employee common stock purchases	181		181
Other comprehensive gain (loss), net of taxes	(95)					(95)
Stock-based compensation expense	757		757
Stock options exercised	4	1	3
Ending Balances at Jun. 30, 2021	66,041	131	27,172	43,552	(4,187)	(627)
Net income	3,406			3,406
Other comprehensive gain (loss), net of taxes	31					31
Stock-based compensation expense	693		693
Ending Balances at Sep. 30, 2021	70,171	131	27,865	46,958	(4,187)	(596)
Beginning Balances at Dec. 31, 2021	74,428	131	28,250	50,841	(4,187)	(607)
Net income	2,332			2,332
Other comprehensive gain (loss), net of taxes	(147)					(147)
Stock-based compensation expense	526		526
Stock options exercised	893	2	891
Ending Balances at Mar. 31, 2022	78,032	133	29,667	53,173	(4,187)	(754)
Beginning Balances at Dec. 31, 2021	74,428	131	28,250	50,841	(4,187)	(607)
Net income	7,174
Other comprehensive gain (loss), net of taxes	(701)
Ending Balances at Sep. 30, 2022	84,467	133	31,814	58,015	(4,187)	(1,308)
Beginning Balances at Mar. 31, 2022	78,032	133	29,667	53,173	(4,187)	(754)
Net income	2,436			2,436
Employee common stock purchases	199		199
Other comprehensive gain (loss), net of taxes	(319)					(319)
Stock-based compensation expense	752		752
Stock options exercised	430		430
Ending Balances at Jun. 30, 2022	81,530	133	31,048	55,609	(4,187)	(1,073)
Net income	2,406			2,406
Employee common stock purchases	(10)		(10)
Other comprehensive gain (loss), net of taxes	(235)					(235)
Stock-based compensation expense	776		776
Ending Balances at Sep. 30, 2022	$ 84,467	$ 133	$ 31,814	$ 58,015	$ (4,187)	$ (1,308)