Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Cash paid for amounts included in measurement of lease liabilities:
Operating cash flows from operating leases	$ 335	$ 325
Operating cash flows from finance leases	2	2
Financing cash flows from finance leases	18	$ 13
Operating leases
Operating lease right-of-use assets	753		$ 946
Operating lease liability, net of current	1,153
Finance leases
Property and equipment, net	2,742		1,883
Total finance lease liabilities	$ 57		$ 75
Weighted Average Remaining Lease Term
Operating Lease, Weighted Average Remaining Lease Term	1 year 9 months 18 days		2 years 3 months 18 days
Finance Lease, Weighted Average Remaining Lease Term	1 year 6 months		2 years
Weighted Average Discount Rate
Operating leases	6.00%		6.00%
Finance leases	6.30%		6.30%
Financial Lease [Member]
Finance leases
Property and equipment, at cost	$ 112		$ 112
Accumulated depreciation	(42)		(28)
Property and equipment, net	70		84
Other Current Liabilities [Member]
Operating leases
Operating lease liability, net of current	686		676
Finance leases
Total finance lease liabilities	24
Other Noncurrent Liabilities [Member]
Operating leases
Operating lease liability, net of current	467		774
Finance leases
Total finance lease liabilities	33
Other Liabilities [Member]
Operating leases
Operating lease liability, net of current	$ 1,153		$ 1,450