Commitments and Contingencies (Future Minimum Lease Payments) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Mar. 07, 2017
Future minimum lease payments
2017	$ 2,079,000			$ 2,100,000
2018	404,000			1,700,000
2019	414,000			1,800,000
2020	425,000			1,900,000
2021	107,000			$ 1,600,000
Total	3,429,000
Rent
Rent expenses	$ 1,800,000	$ 1,600,000	$ 950,000