Consolidated Statements of Changes In Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2018	$ 165	$ 130,547	$ 56,167	$ 271	$ 187,150
Net income	0	0	8,282	0	8,282
Other comprehensive income (loss), net of tax	0	0	0	7	7
Cash dividends declared on common stock	0	0	(4,731)	0	(4,731)
Repurchase and retirement of common stock	(11)	(16,830)	0	0	(16,841)
Balance at Sep. 30, 2019	154	113,717	59,718	278	173,867
Balance at Jun. 30, 2019	154	113,717	57,331	289	171,491
Net income	0	0	3,924	0	3,924
Other comprehensive income (loss), net of tax	0	0	0	(11)	(11)
Cash dividends declared on common stock	0	0	(1,537)	0	(1,537)
Balance at Sep. 30, 2019	154	113,717	59,718	278	173,867
Balance at Dec. 31, 2019	153	112,420	61,573	226	174,372
Net income	0	0	6,718	0	6,718
Other comprehensive income (loss), net of tax	0	0	0	5	5
Cash dividends declared on common stock	0	0	(4,504)	0	(4,504)
Repurchase and retirement of common stock	(5)	(4,189)	0	0	(4,194)
Balance at Sep. 30, 2020	148	108,231	63,787	231	172,397
Balance at Jun. 30, 2020	149	108,748	63,322	235	172,454
Net income	0	0	1,948	0	1,948
Other comprehensive income (loss), net of tax	0	0	0	(4)	(4)
Cash dividends declared on common stock	0	0	(1,483)	0	(1,483)
Repurchase and retirement of common stock	(1)	(517)	0	0	(518)
Balance at Sep. 30, 2020	$ 148	$ 108,231	$ 63,787	$ 231	$ 172,397