Basis of Presentation - Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 23,198	$ 15,915
Cash - restricted	4,423	4,666
Cash - restricted, net of current portion	4,040	4,401
Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows	$ 31,661	$ 24,982