XML 47 R37.htm IDEA: XBRL DOCUMENT v3.21.2
Note 3 - Revenues (Details Textual) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Contract with Customer, Asset, after Allowance for Credit Loss, Total $ 0 $ 0
Revenue, Remaining Performance Obligation, Amount 587,000 $ 468,200
Increase (Decrease) in Contract Liabilities 118,800  
Contract With Customer Liability, Billings Paid in Advance 449,100  
Contract with Customer, Liability, Revenue Recognized $ 330,300  
Revenue Remaining Performance Obligation, Current Percentage 98.00% 99.00%
Contract with Customer, Liability, Noncurrent $ 84,000 $ 73,800