Related Party Transactions (Details) - USD ($) $ in Thousands	5 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2016	Dec. 31, 2016
Dow
Related Party Transaction [Line Items]
Payment amount for services	$ 8,731		$ 8,361
Dow | Amortization of prepayment related to set-up of transition services
Related Party Transaction [Line Items]
Payment amount for services	2,647		1,526
Dow | Ongoing costs of the transition services agreement / Rent and Other
Related Party Transaction [Line Items]
Payment amount for services	4,531		4,346
Dow | Amortization of prepayment related to Dow importation services
Related Party Transaction [Line Items]
Payment amount for services	220		397
Rent expense | Dow | Ongoing costs of the transition services agreement / Rent and Other
Related Party Transaction [Line Items]
Payment amount for services	740		1,198
Other expense | Dow | Ongoing costs of the transition services agreement / Rent and Other
Related Party Transaction [Line Items]
Payment amount for services	$ 593		894
Dow | Transition service agreement, set-up fee
Related Party Transaction [Line Items]
Payment amount for services			$ 5,000
Dow | Import inventory costs
Related Party Transaction [Line Items]
Payment amount for services		$ 600