CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	COMMON STOCK [Member]	TREASURY STOCK [Member]	CAPITAL SURPLUS [Member]	RETAINED EARNINGS [Member]	ACCUMULATED OTHER COMPREHENSIVE LOSS, NET [Member]	Total
Balance at beginning of period at Dec. 31, 2018	$ 266	$ (80,579)	$ 145,782	$ 46,733	$ (14,225)
New common shares issued for exercise of stock options	0		85
Treasury stock, purchased at cost (35,962 and 112,311 shares for the three months ended March 31, 2020 and 2019, respectively)		(476)
Stock option expense			3
Net income				1,878		$ 1,878
Cash dividend declared on common stock ($0.025 and $0.020 per share for the three months ended March 31, 2020 and 2019, respectively)				(349)
Other comprehensive income (loss)					(57)	(57)
Balance at end of period at Mar. 31, 2019	266	(81,055)	145,870	48,262	(14,282)	99,061
Balance at beginning of period at Dec. 31, 2019	267	(83,129)	145,888	51,759	(16,171)	98,614
New common shares issued for exercise of stock options	0		49
Treasury stock, purchased at cost (35,962 and 112,311 shares for the three months ended March 31, 2020 and 2019, respectively)		(151)
Stock option expense			1
Net income				1,409		1,409
Cash dividend declared on common stock ($0.025 and $0.020 per share for the three months ended March 31, 2020 and 2019, respectively)				(423)
Other comprehensive income (loss)					1,341	1,341
Balance at end of period at Mar. 31, 2020	$ 267	$ (83,280)	$ 145,938	$ 52,745	$ (14,830)	$ 100,840