Other Long-term Liabilities - Schedule of Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Other Liabilities Disclosure [Abstract]
Deferred rent liability	$ 40	$ 773
Leasehold improvements financing and other	66	94
Unrecognized tax benefits	116	103
Deferred tax liability	0	124
Other long-term liabilities	$ 222	$ 1,094