Commitments and Contingencies (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) $ / ft²	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) $ / ft²	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Commitments and Contingencies [Abstract]
Lease term	15 years		15 years
Base rent per square foot (in dollars per square foot) | $ / ft²	18		18
Base rental			$ 1,100
Accumulated amortization on the leased property	$ 5,600		5,600		$ 5,500
Lease Cost [Abstract]
Finance lease cost - interest expense	257	$ 264	780	$ 800
Finance lease cost - amortization of right-of-use asset	66	66	200	200
Operating lease cost	143	104	489	284
Sublease income	(26)	(46)	(118)	(138)
Total lease cost	440	388	1,351	1,146
Cash paid for amounts included in the measurement of lease liabilities [Abstract]
Operating cash flows from finance lease	0	0	0	0
Operating cash flows from operating leases	174	87	392	240
Financing cash flows from finance lease	67	56	192	160
Total cash paid for amounts included in the measurement of lease liabilities	241	143	584	400
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 0	$ 0	$ 2,143	$ 324
Weighted average remaining lease term-finance lease	7 years 3 months 18 days	8 years 3 months 18 days	7 years 3 months 18 days	8 years 3 months 18 days
Weighted average remaining lease term-operating leases	2 years 8 months 12 days	2 years 2 months 12 days	2 years 8 months 12 days	2 years 2 months 12 days
Weighted average discount rate-finance lease	19.10%	19.10%	19.10%	19.10%
Weighted average discount rate-operating leases	5.00%	5.00%	5.00%	5.00%
Finance lease right-of-use asset, net of amortization	$ 1,500		$ 1,500		1,700
Operating right-of-use assets, net of amortization	2,500		2,500		$ 800
Finance Leases [Abstract]
2021 (excluding the nine months ended September 30, 2021)	323		323
2022	1,080		1,080
2023	1,080		1,080
2024	1,080		1,080
2025	1,080		1,080
Thereafter	3,240		3,240
Total lease payments	7,883		7,883
Less imputed interest	(3,681)		(3,681)
Total lease liabilities	4,202		4,202
Operating Leases [Abstract]
2021 (excluding the nine months ended September 30, 2021)	213		213
2022	659		659
2023	507		507
2024	384		384
2025	323		323
Thereafter	1,615		1,615
Total lease payments	3,701		3,701
Less imputed interest	(1,042)		(1,042)
Total lease liabilities	2,659		2,659
Total Leases [Abstract]
2021 (excluding the nine months ended September 30, 2021)	536		536
2022	1,739		1,739
2023	1,587		1,587
2024	1,464		1,464
2025	1,403		1,403
Thereafter	4,855		4,855
Total lease payments	11,584		11,584
Less imputed interest	(4,723)		(4,723)
Total lease liabilities	6,861		6,861
Minimum future sublease rental, due from affiliated entities	$ 1,100		$ 1,100
Period of minimum future sublease rental, due from affiliated entities			8 years