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	$ 130	$ 42,536	$ 19,607	$ (32,110)	$ (38)	$ 30,125
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of issuance costs	9	11,201
Share-based compensation expense		952
Issuance of shares from exercise of stock options		284
Relinquishment of stock awards and restricted stock units to pay for withholding taxes		(100)
Net income (loss)			(3,218)			(3,218)
Foreign currency translation adjustment, net of tax					108	108
Ending balance at Sep. 30, 2021	139	54,873	16,389	(32,110)	70	$ 39,361
Supplemental share information
Issuance of common stock (in shares)						842
Issuance of shares from stock awards (in shares)						94
Relinquishment of stock awards to pay withholding taxes (in shares)						32
Beginning balance at Jun. 30, 2021	130	43,408	15,488	(32,110)	47	$ 26,963
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of issuance costs	9	11,201
Share-based compensation expense		257
Issuance of shares from exercise of stock options		7
Relinquishment of stock awards and restricted stock units to pay for withholding taxes		0
Net income (loss)			901			901
Foreign currency translation adjustment, net of tax					23	23
Ending balance at Sep. 30, 2021	139	54,873	16,389	(32,110)	70	$ 39,361
Supplemental share information
Issuance of common stock (in shares)						842
Issuance of shares from stock awards (in shares)						3
Relinquishment of stock awards to pay withholding taxes (in shares)						0
Beginning balance at Dec. 31, 2021	139	55,246	15,566	(32,110)	143	$ 38,984
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of issuance costs	0	0
Share-based compensation expense		868
Issuance of shares from exercise of stock options		0
Relinquishment of stock awards and restricted stock units to pay for withholding taxes		(119)
Net income (loss)			(6,196)			(6,196)
Foreign currency translation adjustment, net of tax					(255)	(255)
Ending balance at Sep. 30, 2022	139	55,995	9,370	(32,110)	(112)	$ 33,282
Supplemental share information
Issuance of common stock (in shares)						0
Issuance of shares from stock awards (in shares)						65
Relinquishment of stock awards to pay withholding taxes (in shares)						26
Beginning balance at Jun. 30, 2022	139	55,708	8,842	(32,110)	93	$ 32,672
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of issuance costs	0	0
Share-based compensation expense		287
Issuance of shares from exercise of stock options		0
Relinquishment of stock awards and restricted stock units to pay for withholding taxes		0
Net income (loss)			528			528
Foreign currency translation adjustment, net of tax					(205)	(205)
Ending balance at Sep. 30, 2022	$ 139	$ 55,995	$ 9,370	$ (32,110)	$ (112)	$ 33,282
Supplemental share information
Issuance of common stock (in shares)						0
Issuance of shares from stock awards (in shares)						2
Relinquishment of stock awards to pay withholding taxes (in shares)						0