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Note 10 - Commitments and Contingencies (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2021
Mar. 31, 2021
GPT Acquisition [Member]    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Accrued Expenses $ 1,899  
Liability for Collecting and Remitting Sales Tax States with Established Nexus [Member]    
Loss Contingency Accrual, Ending Balance $ 2,517 $ 2,714