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Note 9 - Debt (Details Textual) - USD ($)
$ in Thousands
9 Months Ended
Feb. 18, 2021
Sep. 30, 2021
Dec. 31, 2020
Nov. 02, 2020
Dec. 31, 2019
Dec. 27, 2018
Short-term Debt, Total   $ 3,929 $ 15,505      
Loans Payable [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument, Basis Spread on Variable Rate   4.50%        
Senior Debt Facility [Member]            
Debt Instrument, Face Amount $ 185,000          
Debt Issuance Costs, Net, Total   $ 2,485 $ 2,670   $ 4,125  
Senior Debt Facility [Member] | At 21 and 24 Months From Closing [Member]            
Debt Instrument, Amortization, Percent 2.50%          
Senior Debt Facility [Member] | At 27, 30, 33, and 36 Months From Closing [Member]            
Debt Instrument, Amortization, Percent 3.75%          
Senior Debt Facility [Member] | At 39, 42, 45, 48, and 51 Months From Closing [Member]            
Debt Instrument, Amortization, Percent 5.00%          
Senior Debt Facility [Member] | At 54 Months From Closing [Member]            
Debt Instrument, Amortization, Percent 10.00%          
Senior Debt Facility [Member] | At 57 Months From Closing [Member]            
Debt Instrument, Amortization, Percent 15.00%          
Senior Debt Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument, Basis Spread on Variable Rate 4.50%          
Senior Debt Facility [Member] | Revolving Credit Facility [Member]            
Line of Credit Facility, Maximum Borrowing Capacity $ 20,000          
Senior Debt Facility [Member] | Loans Payable [Member]            
Debt Instrument, Face Amount 165,000          
Debt Issuance Costs, Net, Total 11,300          
Interest Expense, Debt, Total 8,500          
Senior Term Agreement [Member] | Loans Payable [Member]            
Debt Issuance Costs, Net, Total   2,500        
Interest Expense, Debt, Total $ 2,500          
Non-recourse Factoring [Member]            
Long-term Debt, Gross   20,200        
BMO Equipment Loan [Member] | Secured Debt [Member]            
Debt Instrument, Face Amount           $ 2,060
Long-term Debt, Gross   100        
Debt Instrument, Interest Rate, Stated Percentage           7.57%
Long-term Debt, Term (Year)           2 years 6 months
Equipment Loan [Member] | Secured Debt [Member]            
Debt Instrument, Face Amount       $ 4,000    
Long-term Debt, Gross   $ 3,300        
Debt Instrument, Interest Rate, Stated Percentage       5.27%    
Long-term Debt, Term (Year)       34 months    
Minimum [Member] | Loans Payable [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument, Basis Spread on Variable Rate   3.75%        
Maximum [Member] | Loans Payable [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument, Basis Spread on Variable Rate   4.50%        
Line of Credit [Member]            
Line of Credit Facility, Maximum Borrowing Capacity   $ 30,000        
Short-term Debt, Total   $ 3,900        
Line of Credit [Member] | Minimum [Member]            
Debt Instrument, Basis Spread on Variable Rate   3.00%        
Line of Credit [Member] | Maximum [Member]            
Debt Instrument, Basis Spread on Variable Rate   4.50%