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Note 9 - Leases (Details Textual)
$ in Thousands
6 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Operating Lease, Right-of-Use Asset $ 5,782   $ 6,701
Operating Lease, Liability, Total 5,923    
Operating Lease, Payments $ 1,211 $ 924  
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