Commitments and Contingencies - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Commitments and Contingencies Disclosure [Line Items]
Operating Leases, Rent Expense	$ 300,000	$ 300,000
Equipment Lease [Member]
Commitments and Contingencies Disclosure [Line Items]
Operating Leases, Rent Expense	182,000	$ 57,000
Operating Leases, Future Minimum Payments Due	$ 1,500,000
Maximum [Member] | Equipment Lease [Member]
Commitments and Contingencies Disclosure [Line Items]
Operating Lease Expiration Year	2020
Minimum [Member] | Equipment Lease [Member]
Commitments and Contingencies Disclosure [Line Items]
Operating Lease Expiration Year	2017