Fair Value of Financial Instruments - Schedule of Fair Value Derivative Liability (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2020	Jun. 30, 2019
Derivative Liability, Fair Value, Gross Liability [Roll Forward]
Balance at December 31, 2019	$ 1,740	$ 1,650	$ 1,650
Change in fair value of derivative liability, recorded as other expense	150	90	240	$ 0
Balance at June 30, 2020	$ 1,890	$ 1,740	$ 1,890

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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