Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Accrued Liabilities and Other Liabilities
Employee related expenses	$ 2,748	$ 1,174
Deferred revenue	761	851
Interest	17	16
Deferred rent	145	13
Professional fees	279
Other expenses	179	105
Total accrued expenses and other liabilities	$ 4,129	$ 2,159