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Note 8 - Leases (Details Textual)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Sep. 30, 2022
USD ($)
Dec. 31, 2021
Number of Operating Right of Use Asset Related to Leased Facility 2   2      
Accounts Receivable, after Allowance for Credit Loss, Current $ 24,201   $ 24,201   $ 12,661  
Lease Receivable [Member]            
Operating Lease, Lease Income 12,900 $ 7,100 38,000 $ 15,200    
Lessor, Operating Lease, Payment to be Received, Next Rolling 12 Months 29,900   29,900      
Equipment [Member] | Lease Receivable [Member]            
Accounts Receivable, after Allowance for Credit Loss, Current $ 10,100   $ 10,100      
Land [Member] | Calgary, Alberta, Canada [Member]            
Number of Operating Right of Use Asset Related to Leased Facility 2   2      
Lessor, Operating Lease, Term of Contract (Year)           5 years
Operating Lease, Lease Income $ 100 $ 100 $ 200 $ 100    
Maximum [Member] | Equipment [Member]            
Lessor, Operating Lease, Term of Contract (Year) 1 year   1 year