Income Taxes (Details 3) - USD ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets, Net [Abstract]
Fixed assets		$ 13	$ 78
Accruals and reserves		122	92
Stock options		247	197
Net operating loss carryforwards		36,608	38,335
Federal and state credits		3,227	3,461
Foreign credits		163	159
Intangible assets		1,497	1,789
Research and development expense		1,487	1,858
Gross deferred tax assets		43,364	45,969
Valuation allowance		(43,238)	(45,846)
Total deferred tax assets		126	123
Deferred tax liabilities	[1]	(569)	(551)
Net deferred tax liabilities		$ (443)	$ (428)

[1] Of this amount, $554,000 relates to the Indian subsidiaries unremitted earnings deferred tax liability. The net deferred income tax liabilities are recorded in other long-term liabilities in the accompanying balance sheet.