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Leases (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
USD ($)
ft²
Dec. 31, 2021
USD ($)
Right-of-use assets:    
Operating lease right-of-use asset $ 334 $ 0
Operating lease liabilities:    
Accrued expenses $ 222  
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Accrued expenses  
Operating lease liability, non-current portion $ 117 $ 0
Total operating lease liabilities $ 339  
Remaining lease term 1 year 6 months  
Discount rate 5.00%  
Operating cash outflows $ 400  
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