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Note 9 - Leases (Details Textual)
$ in Thousands
8 Months Ended 9 Months Ended
Sep. 03, 2021
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Operating Lease, Right-of-Use Asset   $ 5,236   $ 6,701
Operating Lease, Liability, Total   5,356    
Operating Lease, Payments   $ 1,802 $ 1,415  
Incremental Borrowing Rates Term for Discount Rates (Year)   5 years    
Minnesota 1 [Member]        
Number of Leased Facilities   3    
Minnesota 1 [Member] | Lease Expiration in 2022 [Member]        
Number of Leased Facilities   2    
Minnesota 1 [Member] | Lease Expiration in 2023 [Member]        
Number of Leased Facilities   1    
Illinois 1 [Member]        
Number of Leased Facilities 1      
California 1 [Member]        
Number of Leased Facilities   2    
California 1 [Member] | Lease Expiration in 2022 [Member]        
Number of Leased Facilities   1    
California 1 [Member] | Lease Expiration in 2024 [Member]        
Number of Leased Facilities   1    
SINGAPORE        
Number of Leased Facilities   1    
INDONESIA        
Number of Leased Facilities   1    
Operating Lease, Right-of-Use Asset   $ 103    
Operating Lease, Liability, Total   $ 72    
GERMANY        
Number of Leased Facilities   1    
Minimum [Member]        
Lessee, Operating Lease, Term of Contract (Year)   1 year    
Lessee, Operating Lease, Renewal Term (Year)   1 year    
Maximum [Member]        
Lessee, Operating Lease, Renewal Term (Year)   5 years