Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance (in shares) at Dec. 31, 2019		8,092,966
Balance at Dec. 31, 2019	$ 130,256	$ 106,427	$ 23,518	$ 311
Stock awards issued and related compensation expense, shares		25,215
Stock awards issued and related compensation expense	413	$ 413
Shares withheld to pay taxes on stock based compensation , shares		(7,550)
Shares withheld to pay taxes on stock based compensation	(133)	$ (133)
Stock options exercised , shares		11,217
Stock options exercised	83	$ 83
Net income	473		473
Other comprehensive income (loss)	101			101
Balance (in shares) at Mar. 31, 2020		8,121,848
Balance at Mar. 31, 2020	131,193	$ 106,790	23,991	412
Balance (in shares) at Dec. 31, 2019		8,092,966
Balance at Dec. 31, 2019	130,256	$ 106,427	23,518	311
Net income	2,518
Other comprehensive income (loss)	472
Balance (in shares) at Sep. 30, 2020		8,149,678
Balance at Sep. 30, 2020	134,595	$ 107,776	26,036	783
Balance (in shares) at Mar. 31, 2020		8,121,848
Balance at Mar. 31, 2020	131,193	$ 106,790	23,991	412
Stock awards issued and related compensation expense, shares		1,428
Stock awards issued and related compensation expense	314	$ 314
Stock options exercised , shares		10,181
Stock options exercised	137	$ 137
Net income	1,550		1,550
Other comprehensive income (loss)	471			471
Balance (in shares) at Jun. 30, 2020		8,133,457
Balance at Jun. 30, 2020	133,665	$ 107,241	25,541	883
Stock awards issued and related compensation expense, shares		12,483
Stock awards issued and related compensation expense	525	$ 525
Stock options exercised , shares		3,738
Stock options exercised	10	$ 10
Net income	495		495
Other comprehensive income (loss)	(100)			(100)
Balance (in shares) at Sep. 30, 2020		8,149,678
Balance at Sep. 30, 2020	134,595	$ 107,776	26,036	783
Balance (in shares) at Dec. 31, 2020		8,171,734
Balance at Dec. 31, 2020	136,410	$ 107,948	27,821	641
Stock awards issued and related compensation expense, shares		3,369
Stock awards issued and related compensation expense	383	$ 383
Stock options exercised , shares		14,495
Stock options exercised	99	$ 99
Net income	2,809		2,809
Other comprehensive income (loss)	(523)			(523)
Balance (in shares) at Mar. 31, 2021		8,189,598
Balance at Mar. 31, 2021	139,178	$ 108,430	30,630	118
Balance (in shares) at Dec. 31, 2020		8,171,734
Balance at Dec. 31, 2020	136,410	$ 107,948	27,821	641
Net income	10,187
Other comprehensive income (loss)	(419)
Balance (in shares) at Sep. 30, 2021		8,250,109
Balance at Sep. 30, 2021	147,239	$ 109,009	38,008	222
Balance (in shares) at Mar. 31, 2021		8,189,598
Balance at Mar. 31, 2021	139,178	$ 108,430	30,630	118
Stock awards issued and related compensation expense, shares		28,562
Stock awards issued and related compensation expense	234	$ 234
Shares withheld to pay taxes on stock based compensation , shares		(2,740)
Shares withheld to pay taxes on stock based compensation	(150)	$ (150)
Stock options exercised , shares		21,770
Stock options exercised	48	$ 48
Shares withheld to pay exercise price on stock options, shares		(8,074)
Shares withheld to pay exercise price on stock options	(145)	$ (145)
Net income	4,162		4,162
Other comprehensive income (loss)	414			414
Balance (in shares) at Jun. 30, 2021		8,229,116
Balance at Jun. 30, 2021	143,741	$ 108,417	34,792	532
Stock awards issued and related compensation expense, shares		30,053
Stock awards issued and related compensation expense	723	$ 723
Shares withheld to pay taxes on stock based compensation , shares		(10,056)
Shares withheld to pay taxes on stock based compensation	(82)	$ (82)
Stock options exercised , shares		3,750
Stock options exercised	0	$ 0
Shares withheld to pay exercise price on stock options, shares		(2,754)
Shares withheld to pay exercise price on stock options	(49)	$ (49)
Net income	3,216		3,216
Other comprehensive income (loss)	(310)			(310)
Balance (in shares) at Sep. 30, 2021		8,250,109
Balance at Sep. 30, 2021	$ 147,239	$ 109,009	$ 38,008	$ 222