Basis of Presentation - Summary of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Cash and Cash Equivalents		$ 17,403	$ 12,676	$ 17,831	$ 14,761
Restricted Cash		0	50	50	951
Cash, Cash Equivalents, and Restricted Cash	[1]	$ 17,403	$ 12,726	$ 17,881	$ 15,712

[1] See Note 2. Basis of Presentation for our discussion of the EPIC Y-Grade loan conversion and the reconciliation of total cash.