Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Preferred Stock [Member] Series B Convertible Preferred Stock [Member]	Preferred Stock Additional Paid-in Capital [Member]	Common Stock Outstanding [Member]	Common Stock [Member]	Common Stock, Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2021	1		126,624
Balance at Dec. 31, 2021	$ 0	$ 582		$ 22,792	$ 243,996	$ 0	$ (129,234)	$ 0	$ 138,136
Compensation cost for stock options granted	0	0		0	1,806	0	0		1,806
Net loss	$ 0	0		0	0	0	(4,786)	0	(4,786)
Balance (in shares) at Mar. 31, 2022	1		126,624
Balance at Mar. 31, 2022	$ 0	582		22,792	245,802	0	(134,020)	0	135,156
Balance (in shares) at Dec. 31, 2021	1		126,624
Balance at Dec. 31, 2021	$ 0	582		22,792	243,996	0	(129,234)	0	138,136
Net loss									(19,469)
Balance (in shares) at Sep. 30, 2022	1		126,624
Balance at Sep. 30, 2022	$ 0	582		22,792	249,239	0	(148,703)	(54)	123,856
Balance (in shares) at Mar. 31, 2022	1		126,624
Balance at Mar. 31, 2022	$ 0	582		22,792	245,802	0	(134,020)	0	135,156
Compensation cost for stock options granted	0	0		0	1,771	0	0		1,771
Net loss	$ 0	0		0	0	0	(6,672)	0	(6,672)
Balance (in shares) at Jun. 30, 2022	1		126,624
Balance at Jun. 30, 2022	$ 0	582		22,792	247,573	0	(140,692)	0	130,255
Compensation cost for stock options granted	0	0		0	1,666	0	0	0	1,666
Net loss	0	0		0	0	0	(8,011)	0	(8,011)
Foreign currency translation adjustment	$ 0	0		0	0	0	0	(54)	(54)
Balance (in shares) at Sep. 30, 2022	1		126,624
Balance at Sep. 30, 2022	$ 0	582		22,792	249,239	0	(148,703)	(54)	123,856
Balance (in shares) at Dec. 31, 2022	1		126,624
Balance at Dec. 31, 2022	$ 0	582		22,792	250,784	0	(156,194)	0	117,964
Compensation cost for stock options granted	0	0		0	1,573	0	0	0	1,573
Net loss	$ 0	0		0	0	0	(6,281)	0	(6,281)
Balance (in shares) at Mar. 31, 2023	1		126,624
Balance at Mar. 31, 2023	$ 0	582		22,792	252,357	0	(162,475)	0	113,256
Balance (in shares) at Dec. 31, 2022	1		126,624
Balance at Dec. 31, 2022	$ 0	582		22,792	250,784	0	(156,194)	0	117,964
Net loss									(22,340)
Balance (in shares) at Sep. 30, 2023	1		125,304
Balance at Sep. 30, 2023	$ 0	582		22,792	254,886	(1,475)	(178,534)	0	98,251
Balance (in shares) at Mar. 31, 2023	1		126,624
Balance at Mar. 31, 2023	$ 0	582		22,792	252,357	0	(162,475)	0	113,256
Compensation cost for stock options granted	0	0		0	1,603	0	0	0	1,603
Net loss	$ 0	0		0	0	0	(9,830)		(9,830)
Common stock repurchased (in shares)	0		(119)
Common stock repurchased	$ 0	0		0	0	(152)	0	0	(152)
Balance (in shares) at Jun. 30, 2023	1		126,505
Balance at Jun. 30, 2023	$ 0	582		22,792	253,960	(152)	(172,305)	0	104,877
Compensation cost for stock options granted	0	0		0	926	0	0	0	926
Net loss	$ 0	0		0	0	0	(6,229)		(6,229)
Common stock repurchased (in shares)	0		(1,201)
Common stock repurchased	$ 0	0		0	0	(1,323)	0	0	(1,323)
Balance (in shares) at Sep. 30, 2023	1		125,304
Balance at Sep. 30, 2023	$ 0	$ 582		$ 22,792	$ 254,886	$ (1,475)	$ (178,534)	$ 0	$ 98,251