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Note 11 - Costs to Obtain and Fulfill a Contract (Details Textual)
$ in Thousands
9 Months Ended
Sep. 30, 2021
USD ($)
Deferred Costs of Acquisition [Member]  
Increase (Decrease) in Capitalized Costs $ 130,500
Capitalized Contract Cost, Amortization $ 128,400
Deferred Costs of Acquisition [Member] | Minimum [Member]  
Capitalized Contract Cost, Amortization Period (Year) 1 year
Deferred Costs of Acquisition [Member] | Maximum [Member]  
Capitalized Contract Cost, Amortization Period (Year) 10 years
Domain Registration Costs [Member]  
Capitalized Contract Cost, Impairment Loss $ 0