Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts Payable and Accrued Expenses
Accounts payable	$ 7,398	$ 6,318
Accrued purchases	4,108	2,992
Accrued payroll and other benefits	2,063	243
Accrued distributions		1,367
Accrued transaction costs		1,137
Other	4,654	1,027
Total accounts payable and accrued expenses	$ 18,223	$ 13,084