Other Long-term Liabilities - Schedule of Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Liabilities Disclosure [Abstract]
Deferred rent liability	$ 773	$ 746
Leasehold improvements financing and other (see a and b below)	94	128
Unrecognized tax benefits	103	244
Deferred tax liability	124
Term Loan Credit Facility repayment fee (Note 10)		619
Other long-term liabilities	$ 1,094	$ 1,737