Summary of Significant Accounting Policies - Deferred Debt Financing Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016
Deferred Debt Issuance Costs
Deferred financing costs	$ 175	$ 59
Accounting Standards Update 2015-03 | Other assets
Deferred Debt Issuance Costs
Reclassification from other assets to current portion of long term debt	(105)
Accounting Standards Update 2015-03 | Current portion of long-term debt
Deferred Debt Issuance Costs
Reclassification from other assets to current portion of long term debt	$ 105