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		559
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			1,316			1,316
Dividends declared and paid on common stock			(2,011)
Foreign currency translation adjustment, net of tax					66	66
Ending balance at Sep. 30, 2019	115	32,474	26,820	$ (32,110)	(16)	$ 27,283
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)						$ 0.27
Beginning balance at Jun. 30, 2019	115	32,301	27,108		17	$ 27,431
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		173
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			384			384
Dividends declared and paid on common stock			(672)
Foreign currency translation adjustment, net of tax					(33)	(33)
Ending balance at Sep. 30, 2019	115	32,474	26,820	(32,110)	(16)	$ 27,283
Supplemental share information
Issuance of shares from stock awards (in shares)						1
Relinquishment of stock awards to pay withholding taxes (in shares)						0
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		644
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			(3,712)			(3,712)
Dividends declared and paid on common stock			0
Foreign currency translation adjustment, net of tax					(3)	(3)
Ending balance at Sep. 30, 2020	116	33,560	21,636	(32,110)	(34)	$ 23,168
Supplemental share information
Issuance of shares from stock awards (in shares)						93
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 Jun. 30, 2020	116	33,329	22,503		50	$ 23,888
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		231
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			(867)			(867)
Dividends declared and paid on common stock			0
Foreign currency translation adjustment, net of tax					(84)	(84)
Ending balance at Sep. 30, 2020	$ 116	$ 33,560	$ 21,636	$ (32,110)	$ (34)	$ 23,168
Supplemental share information
Issuance of shares from stock awards (in shares)						2
Relinquishment of stock awards to pay withholding taxes (in shares)						0
Dividends per share of common stock (in dollars per share)						$ 0