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Note 5 - Revenue from Contracts with Customers (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Contract with Customer, Liability, Revenue Recognized $ 100,000 $ 83,500
Amortization of Deferred Sales Commissions 1,200 900
Capitalized Contract Cost, Impairment Loss $ 0 $ 0