Income Taxes (Details 4) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Credit carryforward	$ 3,077	$ 2,960
Stock-based compensation	138	398
Other	3,334	3,647
Net operating losses	32,362	60,774
Gross deferred tax assets	38,911	67,779
Deferred tax liabilities:
Intangible assets other than goodwill	(1,609)	(2,299)
Other	(479)	(496)
Valuation allowance	(16,284)	(37,493)
Net deferred tax assets	$ 20,539	$ 27,491

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