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Note 7 - Loan Payable (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2023
Dec. 31, 2021
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Mar. 30, 2023
Feb. 28, 2019
Debt Instrument, Fee, Percentage of Aggregate Principle Amount 4.95%              
Amortization of Debt Issuance Costs         $ 1,739 $ 1,383    
The First Amendment Warrant [Member]                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) 50,172              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 14.7              
Class of Warrant or Right, Term (Year) 7 years              
Term Loan [Member]                
Debt Instrument, First Advance Drawn               $ 30,000
Amended Term Loan [Member]                
Debt Instrument, First Advance Drawn   $ 70,000            
Debt Instrument, Interest Rate, Stated Percentage   5.40%            
Paid-in-Kind Interest, Rate   3.45%            
Amended Term Loan [Member] | Debt Instrument Prepayment Occurs Prior To First Anniversary Of First Amendment Effective Date [Member]                
Debt Instrument, Prepayment Penalty, Percentage of Principle Amount Prepaid 1.50%              
Amended Term Loan [Member] | Debt Instrument Prepayment Occurs On Or After First Anniversary Of First Amendment Effective Date [Member]                
Debt Instrument, Prepayment Penalty, Percentage of Principle Amount Prepaid 1.00%              
Amended Term Loan [Member] | Prime Rate [Member]                
Debt Instrument, Basis Spread on Variable Rate   2.15%            
The First Amendment Term Loan [Member]                
Debt Instrument, Interest Rate, Stated Percentage 8.95%              
Paid-in-Kind Interest, Rate 2.25%              
Debt Instrument, Tranche 3A $ 25,000              
Debt Instrument, Tranche 3, Remaining Balance 20,000              
Debt Instrument, Tranche 3B 10,000              
Debt Instrument, Tranche 3C 10,000              
Debt Instrument, Tranche 4 60,000           $ 65,000  
Debt Instrument, Tranche 5 $ 25,000              
Warrant Coverage Percentage 2.95%              
Debt Issuance Costs, Net $ 2,000              
Amortization of Debt Issuance Costs     $ 600 $ 500 1,700 1,400    
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net     $ 5,800 $ 6,000 $ 5,800 $ 6,000    
The First Amendment Term Loan [Member] | Prime Rate [Member]                
Debt Instrument, Basis Spread on Variable Rate 1.20%              
Term Loan Advances [Member]                
Debt Instrument, Fee, Percentage of Aggregate Principle Amount 5.95%              
Term Loan [Member]                
Line of Credit Facility, Maximum Borrowing Capacity               $ 60,000
Amended Term Loan [Member]                
Line of Credit Facility, Maximum Borrowing Capacity   $ 200,000            
Line of Credit, Current   $ 7,800