Accrued Liabilities - Schedule of Current Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accrued liabilities, current
Loss on purchase commitments (Note 13)	$ 9,383	$ 9,402
Severance costs	2,918	3,558
Payroll and benefits	1,053	1,789
Contingent liability for earn-out provision	1,081	1,416
Taxes other than income taxes	883	544
Due to third parties	531	434
Legal costs	980	333
Deferred revenue, current	134	146
Other	968	653
Total current accrued liabilities	$ 17,931	$ 18,275