Accrued Liabilities - Schedule of Current Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accrued liabilities, current
Loss on purchase commitments (Note 16)	$ 9,402	$ 15,750
Severance costs	3,558	3,450
Payroll and benefits	1,789	471
Contingent liability for earn-out provision	1,416	0
Taxes other than income taxes	544	1,799
Due to third parties	434	2,509
Legal costs	333	149
Deferred revenue, current	146	0
Other	653	424
Total current accrued liabilities	$ 18,275	$ 24,552