Unaudited Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2020	$ 90	$ 93,162	$ 14,067	$ 0
Balance (in shares) at Dec. 31, 2020	9,044,765
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			5,104		$ 5,104
Exercise of employee stock options (in shares)	0
Shares issued for stock options	$ 0
Shares issued for restricted stock units (in shares)	4,491
Shares issued for restricted stock units	$ 0
Stock-based compensation expense		302
Cash dividends declared			(995)
Net change due to unrealized loss				0	0
Balance at Mar. 31, 2021	$ 90	93,464	18,176	0	111,730
Balance (in shares) at Mar. 31, 2021	9,049,256
Balance at Dec. 31, 2021	$ 91	94,024	33,149	144	127,408
Balance (in shares) at Dec. 31, 2021	9,071,417
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			6,184		6,184
Exercise of employee stock options (in shares)	10,625
Shares issued for stock options	$ 0
Shares issued for restricted stock units (in shares)	12,426
Shares issued for restricted stock units	$ 0
Stock-based compensation expense		286
Cash dividends declared			(1,091)
Net change due to unrealized loss				(4,139)	(3,995)
Balance at Mar. 31, 2022	$ 91	$ 94,310	$ 38,242	$ (3,995)	$ 128,648
Balance (in shares) at Mar. 31, 2022	9,094,468