CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2019	$ 42,586	$ (78)	$ 39,470	$ 81,978
Balance (in shares) at Dec. 31, 2019	8,472,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	2,758	2,758
Exercise of stock options	$ 0	0	0	0
Exercise of stock options (in shares)	0
Stock based compensation	$ 180	0	0	180
Stock based compensation (in shares)	0
Dividends on common stock	$ 0	0	(848)	(848)
Dividends on common stock (in shares)	0
Other comprehensive income, net	$ 0	25	0	25
Balance at Jun. 30, 2020	$ 42,766	(53)	41,380	84,093
Balance (in shares) at Jun. 30, 2020	8,472,000
Balance at Mar. 31, 2020	$ 42,671	(112)	40,602	83,161
Balance (in shares) at Mar. 31, 2020	8,472,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	1,160	1,160
Exercise of stock options	$ 0	0	0	0
Exercise of stock options (in shares)	0
Stock based compensation	$ 95	0	0	95
Stock based compensation (in shares)	0
Dividends on common stock	$ 0	0	(382)	(382)
Dividends on common stock (in shares)	0
Other comprehensive income, net	$ 0	59	0	59
Balance at Jun. 30, 2020	$ 42,766	(53)	41,380	84,093
Balance (in shares) at Jun. 30, 2020	8,472,000
Balance at Dec. 31, 2020	$ 42,909	35	46,063	$ 89,007
Balance (in shares) at Dec. 31, 2020	8,473,000			8,473,063
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	6,572	$ 6,572
Exercise of stock options	$ 745	0	0	745
Exercise of stock options (in shares)	116,000
Stock based compensation	$ 126	0	0	126
Stock based compensation (in shares)	0
Dividends on common stock	$ 0	0	(1,108)	(1,108)
Dividends on common stock (in shares)	0
Other comprehensive income, net	$ 0	115	0	115
Balance at Jun. 30, 2021	$ 43,780	150	51,527	$ 95,457
Balance (in shares) at Jun. 30, 2021	8,589,000			8,589,166
Balance at Mar. 31, 2021	$ 43,227	(10)	48,574	$ 91,791
Balance (in shares) at Mar. 31, 2021	8,524,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	3,551	3,551
Exercise of stock options	$ 494	0	0	494
Exercise of stock options (in shares)	65,000
Stock based compensation	$ 59	0	0	59
Stock based compensation (in shares)	0
Dividends on common stock	$ 0	0	(598)	(598)
Dividends on common stock (in shares)	0
Other comprehensive income, net	$ 0	160	0	160
Balance at Jun. 30, 2021	$ 43,780	$ 150	$ 51,527	$ 95,457
Balance (in shares) at Jun. 30, 2021	8,589,000			8,589,166