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Commitments and Contingencies - Summary of Lease Liabilities and Right-of-Use Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets
Operating	$ 636	$ 781
Financing	7	134
Total leased assets	643	915
Liabilities
Operating lease liabilities, current	123	147
Financing lease liabilities, current	10	120
Operating lease liabilities. noncurrent	528	646
Financing lease liabilities, noncurrent		8
Total lease liabilities	$ 661	$ 921
Weighted-average remaining lease term (years) - operating leases	6 years 6 months 25 days	6 years 10 months 20 days
Weighted-average remaining lease term (years) - finance leases	5 months 1 day	1 year 29 days
Weighted-average discount rate - operating leases	7.79%	7.93%
Weighted-average discount rate - finance leases	5.00%	5.00%

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