CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2019	$ 218	$ 79,400	$ (54,654)	$ (1,846)	$ (2,999)	$ 20,119
Balance (in shares) at Dec. 31, 2019	21,839				(1,599)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 0	357	0	0	$ 0	357
Common stock issued for RSUs vested (in shares)	381
Common stock issued for RSUs vested	$ 4	(4)	0	0	0	0
Shares withheld to pay taxes	0	(77)	0	0	0	(77)
Foreign currency translation adjustment	0	0	0	104	0	104
Net income (loss)	0	0	(9,068)	0		(9,068)
Balance at Sep. 30, 2020	$ 222	79,676	(63,722)	(1,742)	$ (2,999)	11,435
Balance (in shares) at Sep. 30, 2020	22,220				(1,599)
Balance at Jun. 30, 2020	$ 221	79,676	(63,061)	(1,826)	$ (2,999)	12,011
Balance (in shares) at Jun. 30, 2020	22,150				(1,599)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 0	33	0	0	$ 0	33
Common stock issued for RSUs vested (in shares)	70
Common stock issued for RSUs vested	$ 1	(1)	0	0	0	0
Shares withheld to pay taxes	0	(32)	0	0	0	(32)
Foreign currency translation adjustment	0	0	0	84	0	84
Net income (loss)	0	0	(661)	0	0	(661)
Balance at Sep. 30, 2020	$ 222	79,676	(63,722)	(1,742)	$ (2,999)	11,435
Balance (in shares) at Sep. 30, 2020	22,220				(1,599)
Balance at Dec. 31, 2020	$ 222	79,687	(65,191)	(1,214)	$ (2,999)	10,505
Balance (in shares) at Dec. 31, 2020	22,193				(1,599)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 0	784	0	0	$ 0	784
Common stock issued for RSUs vested (in shares)	306
Common stock issued for RSUs vested	$ 3	(3)	0	0	0	0
Shares withheld to pay taxes	0	(188)	0	0	0	(188)
Foreign currency translation adjustment	0	0	0	1,109	0	1,109
Net income (loss)	0	0	12,464	0	0	12,464
Balance at Sep. 30, 2021	$ 225	80,280	(52,727)	(105)	$ (2,999)	24,674
Balance (in shares) at Sep. 30, 2021	22,499				(1,599)
Balance at Jun. 30, 2021	$ 225	80,024	(64,165)	(82)	$ (2,999)	13,003
Balance (in shares) at Jun. 30, 2021	22,461				(1,599)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 0	283	0	0	$ 0	283
Common stock issued for RSUs vested (in shares)	38
Common stock issued for RSUs vested	$ 0	0	0	0	0	0
Shares withheld to pay taxes	0	(27)	0	0	0	(27)
Foreign currency translation adjustment	0	0	0	(23)	0	(23)
Net income (loss)	0	0	11,438	0	0	11,438
Balance at Sep. 30, 2021	$ 225	$ 80,280	$ (52,727)	$ (105)	$ (2,999)	$ 24,674
Balance (in shares) at Sep. 30, 2021	22,499				(1,599)