Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Lease Narrative) (Details)

v3.20.2
Commitments and Contingencies (Lease Narrative) (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Lessee, Lease, Description [Line Items]        
Gain (Loss) on Termination of Lease     $ 0 $ 21,000
Sublease Income $ 0 $ 32,000 $ 0 105,000
Lessee, Finance Lease, Term of Contract 2 years   2 years  
Lessee, Operating Lease, Term of Contract 4 years   4 years  
Lessee, Operating Lease, Number Of Offices     2  
Lessee, Operating Lease, Renewal Term 5 years   5 years  
Minneapolis Headquarters [Member]        
Lessee, Lease, Description [Line Items]        
Gain (Loss) on Termination of Lease       $ 21,000