CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - 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), Net of Tax [Member]	Total
Beginning balance at Dec. 31, 2020		$ 42,536	$ 19,607		$ (38)	$ 30,125
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		695
Issuance of shares from exercise of stock options		277
Relinquishment of stock awards and restricted stock units to pay for withholding taxes		(100)
Net loss			(4,119)			(4,119)
Foreign currency translation adjustment, net of tax					85	85
Ending balance at Jun. 30, 2021	$ 130	43,408	15,488	$ (32,110)	47	$ 26,963
Supplemental share information
Issuance of shares from stock awards (in shares)						92
Relinquishment of stock awards to pay withholding taxes (in shares)						32
Beginning balance at Mar. 31, 2021		42,816	17,518		15	$ 28,369
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		431
Issuance of shares from exercise of stock options		186
Relinquishment of stock awards and restricted stock units to pay for withholding taxes		(25)
Net loss			(2,030)			(2,030)
Foreign currency translation adjustment, net of tax					32	32
Ending balance at Jun. 30, 2021	130	43,408	15,488	(32,110)	47	$ 26,963
Supplemental share information
Issuance of shares from stock awards (in shares)						27
Relinquishment of stock awards to pay withholding taxes (in shares)						1
Beginning balance at Dec. 31, 2021		55,246	15,566		143	$ 38,984
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss						(4,348)
Ending balance at Mar. 31, 2022		55,423	11,218		101	34,771
Beginning balance at Dec. 31, 2021		55,246	15,566		143	38,984
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		581
Issuance of shares from exercise of stock options		0
Relinquishment of stock awards and restricted stock units to pay for withholding taxes		(119)
Net loss			(6,724)			(6,724)
Foreign currency translation adjustment, net of tax					(50)	(50)
Ending balance at Jun. 30, 2022	139	55,708	8,842	(32,110)	93	$ 32,672
Supplemental share information
Issuance of shares from stock awards (in shares)						63
Relinquishment of stock awards to pay withholding taxes (in shares)						26
Beginning balance at Mar. 31, 2022		55,423	11,218		101	$ 34,771
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense		285
Issuance of shares from exercise of stock options		0
Relinquishment of stock awards and restricted stock units to pay for withholding taxes		0
Net loss			(2,376)			(2,376)
Foreign currency translation adjustment, net of tax					(8)	(8)
Ending balance at Jun. 30, 2022	$ 139	$ 55,708	$ 8,842	$ (32,110)	$ 93	$ 32,672
Supplemental share information
Issuance of shares from stock awards (in shares)						0
Relinquishment of stock awards to pay withholding taxes (in shares)						0