Note 4 - Revenue Recognition (Details Textual) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2020 |
Jun. 30, 2020 |
|
| Contract with Customer, Asset, after Allowance for Credit Loss, Current, Total | $ 14.6 | $ 14.6 | |
| Contract with Customer, Liability, Total | 90.0 | 90.0 | $ 62.6 |
| Contract with Customer, Liability, Revenue Recognized | $ 12.0 | $ 57.9 |
| X | ||||||||||
- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|