Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	Mar. 31, 2020	Jul. 01, 2019	Jun. 30, 2019	Mar. 31, 2019	Jul. 01, 2018	Jun. 30, 2018
Cumulative Effect on Retained Earnings, Net of Tax, Total	$ 124,707,000		$ 119,937,000	$ 120,239,000		$ 139,251,000
Operating Lease, Right-of-Use Asset	9,050,000
Operating Lease, Liability, Total	9,802,000
Retained Earnings [Member]
Cumulative Effect on Retained Earnings, Net of Tax, Total	$ (2,115,000)		(5,808,000)	$ (5,368,000)		15,124,000
Cumulative Effect, Period of Adoption, Adjustment [Member]
Cumulative Effect on Retained Earnings, Net of Tax, Total			(428,000)			591,000
Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Earnings [Member]
Cumulative Effect on Retained Earnings, Net of Tax, Total			$ (428,000)			$ 591,000
Accounting Standards Update 2014-09 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Earnings [Member]
Cumulative Effect on Retained Earnings, Net of Tax, Total					$ 591,000
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset		$ 10,400,000
Operating Lease, Liability, Total		$ 10,800,000