Accrued Expenses and Other Liabilities - Schedule of Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accrued Expenses, Current [Abstract]
Accrued professional fees	$ 447	$ 246
Accrued compensation costs	272	189
Accrued sales taxes and regulatory fees	157	168
Other accrued expenses	105	223
Right to use lease liability	92
Accrued dividends on Series A-2 Preferred Stock	86	71
Deferred rent expense	0	13
Accrued expenses and other liabilities	$ 1,159	$ 910