Note 7 - Leases (Details Textual) $ in Millions  | 
3 Months Ended | 
|---|---|
| 
 Sep. 30, 2021  
USD ($) 
 | |
| Variable Lease, Cost | $ 1.1 | 
| Fixed Lease, Cost | $ 3.7 | 
| Maximum [Member] | |
| Lessee, Operating Lease, Renewal Term (Year) | 5 years | 
| X | ||||||||||
- Definition Represents the amount of fixed lease cost. No definition available. 
  | 
| X | ||||||||||
- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
  | 
| X | ||||||||||
- Definition Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
  | 
| X | ||||||||||
- Details 
  |