Other Liabilities (Schedule of Long Term Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Other Liabilities [Abstract]
Operating lease liability, noncurrent	$ 174
Indemnification liabilities (see Note 13)	171	$ 184
Liabilities for uncertain tax positions	13,775	13,315
Long-term liabilities	$ 14,120	$ 13,499