Other Liabilities (Schedule of Long Term Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other Liabilities [Abstract]
Operating lease liability, noncurrent	$ 0	$ 345
Operating lease liability, noncurrent statement of financial position	us-gaap:OtherLiabilitiesNoncurrent	us-gaap:OtherLiabilitiesNoncurrent
Indemnification liabilities (see Note 13)	$ 145	$ 145
Liabilities for uncertain tax positions	19,769	17,352
Long-term liabilities	$ 19,914	$ 17,842