Right to Use Liability - Future Changes in the Right to Use Liabilities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Right to Use Liabilities
2018	$ 863
2019	23
Amounts representing interest	(19)
Present value of net minimum right to use liability payments	867
Scheduled derecognition of right to use liability due to reductions in the lease deposit to less than two months? rent	5,000
Right to Use Liabilities
Right to Use Liabilities
2018	583
2019	486
2020	486
2021	487
2022	487
Thereafter	13,325
Total minimum lease payments	15,854
Amounts representing interest	(5,661)
Present value of net minimum right to use liability payments	$ 10,193