Leases (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) ft²	Dec. 31, 2021 USD ($)	Mar. 31, 2021 USD ($)
Right-of-assets:
Operating lease right-of-use asset	$ 522	$ 0
Operating Lease, Liability [Abstract]
Accrued expenses	208
Operating lease liability, non-current portion	304	$ 0	$ 512
Total operating lease liabilities	$ 512
Remaining lease term	2 years 3 months 18 days
Discount rate	5.00%
Operating cash outflows	$ 200
Office space in Minneapolis, Minnesota
Lessee, Lease, Description [Line Items]
Area of land leased | ft²	23,890
Lessee, Operating Lease, Existence of Option to Extend [true false]	true
Lessee, Operating Lease, Renewal Term	5 years