Leases (Details) - Schedule of supplemental balance sheet information related to lease - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2021	Dec. 31, 2020
Operating leases
Operating lease right-of-use assets		$ 488	$ 919
Current portion of operating lease obligations		314	504
Operating lease liabilities, net of current portion		36	377
Total operating lease liabilities		350	881
Finance leases
Property and equipment, at cost		3,569	3,806
Accumulated depreciation		(3,193)	(2,941)
Property and equipment, net		376	865
Current portion of finance lease obligations		369	769
Finance lease liabilities, net of current portion		28	95
Total finance lease liabilities		$ 397	$ 864
Weighted Average Remaining Lease Term
Operating leases		1 year 2 months 12 days	1 year 7 months 6 days
Finance leases		4 months 24 days	9 months 18 days
Weighted Average Discount Rate:
Operating leases	[1]	5.00%	5.00%
Finance leases		2.00%	2.00%

[1] Upon adoption of the new lease standard, discount rates used for existing leases were established at January 1, 2019