Summary of Significant Accounting Policies - Components of Operating and Finance Lease Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Operating lease cost:
Total operating lease costs	$ 2,625
Finance lease cost:
Amortization of right-of-use assets	886
Interest on lease liabilities	290
Total financing lease cost	$ 1,176