Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2019		13,042,293
Balance at Dec. 31, 2019		$ 138,877	$ (987)	$ (128,194)	$ 9,696
Exercise of stock options (in shares)					25,000
Exercise of stock options		$ 34			$ 34
Share-based compensation, including issuance of restricted stock (in shares)		137,846
Share-based compensation, including issuance of restricted stock		$ 601			601
Net loss				(1,683)	(1,683)
Foreign currency translation adjustment, net of tax			(27)		(23)
Foreign currency translation adjustment, net of tax		4
Unrealized gain (loss) on investments, net of tax			(3)		(3)
Balance (in shares) at Sep. 30, 2020		13,180,139
Balance at Sep. 30, 2020		$ 139,516	(1,017)	(129,877)	8,622
Balance (in shares) at Jun. 30, 2020		13,155,139
Balance at Jun. 30, 2020		$ 139,199	(1,025)	(129,741)	8,433
Exercise of stock options (in shares)		25,000
Exercise of stock options		$ 34			34
Share-based compensation, including issuance of restricted stock (in shares)
Share-based compensation, including issuance of restricted stock		$ 281			281
Net loss				(136)	(136)
Foreign currency translation adjustment, net of tax			11		13
Foreign currency translation adjustment, net of tax		2
Unrealized gain (loss) on investments, net of tax			(3)		(3)
Balance (in shares) at Sep. 30, 2020		13,180,139
Balance at Sep. 30, 2020		$ 139,516	$ (1,017)	$ (129,877)	$ 8,622