Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021	Jul. 31, 2021	May 31, 2021	May 31, 2020	May 31, 2019
Leases [Abstract]
Operating lease right-of-use assets, net	$ 208,000	$ 1,165,000	$ 44,000	$ 1,200,000	$ 172,000
Short-term operating lease liability	$ 292,000	$ 741,000
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued Liabilities, Current	Accrued Liabilities, Current
Long-term operating lease liabilities	$ 34,000	$ 420,000
Operating lease liability	326,000	1,161,000			172,000	$ 0
Finance lease right of use asset	$ 124,000	$ 557,000
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant and Equipment, Net	Property, Plant and Equipment, Net
Finance lease accumulated amortization	$ (31,000)	$ (557,000)
Total finance lease right of use asset, net	$ 93,000
Weighted average remaining lease term
Operating leases	1 year 1 month 6 days	1 year 7 months 6 days
Finance leases	1 year 3 months 18 days
Weighted average discount rate
Operating leases	5.14%	1.87%
Finance leases	4.45%
Operating Lease, Liability, Payment, Due [Abstract]
2022 (excluding the nine months ended September 30, 2022)	$ 80,000	$ 757,000
2023	256,000	422,000
Total lease payments	336,000	1,179,000
Less: imputed interest	(10,000)	(18,000)
Operating lease liability	$ 326,000	$ 1,161,000			$ 172,000	$ 0