Accrued Expenses and Other Liabilities - Schedule of Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accrued Expenses, Current [Abstract]
Accrued compensation costs	$ 202	$ 189
Accrued sales taxes and regulatory fees	132	168
Other accrued expenses	105	223
Right to use lease liability	71	0
Accrued professional fees	4	246
Deferred rent expense	0	13
Accrued expenses and other liabilities	604	910
Series A-2 Preferred Stock
Accrued Expenses, Current [Abstract]
Accrued dividends on Series A-2 Preferred Stock	$ 90	$ 71