Accrued Expenses and Other Liabilities - Schedule of Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accrued Expenses, Current [Abstract]
Other accrued expenses	$ 264	$ 316
Accrued compensation costs	227	129
Accrued marketing expense	136	0
Deferred revenue	87	393
Super G Warrant liability	0	165
Accrued expenses and other liabilities	$ 714	$ 1,003