CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Beginning balance at Dec. 31, 2018	$ 115	$ 32,129	$ 27,515		$ (82)	$ 27,567
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		386
Issuance of shares from exercise of stock options	0	0
Relinquishment of stock awards and deferred stock units to pay for withholding taxes		(214)
Net income			932			932
Dividends declared and paid on common stock			(1,339)
Foreign currency translation adjustment, net of tax					99	99
Ending balance at Jun. 30, 2019		32,301	27,108	$ (32,110)	17	$ 27,431
Supplemental share information
Issuance of shares from stock awards (in shares)						73
Relinquishment of stock awards to pay withholding taxes (in shares)						21
Dividends per share of common stock (in dollars per share)						$ 0.18
Beginning balance at Mar. 31, 2019	115	32,103	27,593		(73)	$ 27,628
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		213
Issuance of shares from exercise of stock options	0	0
Relinquishment of stock awards and deferred stock units to pay for withholding taxes		(15)
Net income			186			186
Dividends declared and paid on common stock			(671)
Foreign currency translation adjustment, net of tax					90	90
Ending balance at Jun. 30, 2019		32,301	27,108	(32,110)	17	$ 27,431
Supplemental share information
Issuance of shares from stock awards (in shares)						16
Relinquishment of stock awards to pay withholding taxes (in shares)						2
Dividends per share of common stock (in dollars per share)						$ 0.09
Beginning balance at Dec. 31, 2019	115	32,604	25,348		(31)	$ 25,926
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		413
Issuance of shares from exercise of stock options	1	353
Relinquishment of stock awards and deferred stock units to pay for withholding taxes		(41)
Net income			(2,845)			(2,845)
Dividends declared and paid on common stock			0
Foreign currency translation adjustment, net of tax					81	81
Ending balance at Jun. 30, 2020	116	33,329	22,503	(32,110)	50	$ 23,888
Supplemental share information
Issuance of shares from stock awards (in shares)						91
Relinquishment of stock awards to pay withholding taxes (in shares)						14
Dividends per share of common stock (in dollars per share)						$ 0
Beginning balance at Mar. 31, 2020	116	33,103	24,356		40	$ 25,505
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		226
Issuance of shares from exercise of stock options	0	0
Relinquishment of stock awards and deferred stock units to pay for withholding taxes		0
Net income			(1,853)			(1,853)
Dividends declared and paid on common stock			0
Foreign currency translation adjustment, net of tax					10	10
Ending balance at Jun. 30, 2020	$ 116	$ 33,329	$ 22,503	$ (32,110)	$ 50	$ 23,888
Supplemental share information
Issuance of shares from stock awards (in shares)						9
Relinquishment of stock awards to pay withholding taxes (in shares)						0
Dividends per share of common stock (in dollars per share)						$ 0