Leases - Summary of Lease Cost and Cash Flow Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Lease Cost
ROU operating lease cost	$ 2,735		$ 8,850
Short-term Lease, Cost	2,899		9,384
Finance Lease Cost:
Amortization of ROU assets	4,287,000		14,078,000
Finance Lease, Interest Expense	1,210,000	$ 512,000	3,459,000	$ 1,551,000
Total finance lease cost	5,497,000		17,537,000
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	5,634		18,234
Financing cash flows from finance leases	$ 4,744,000		$ 20,210,000