BASIS OF PRESENTATION OF UNAUDITED INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Accounting Standards Recently Adopted by the Company (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018	Jun. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash, cash equivalents and restricted cash	$ 94,839	$ 148,774	$ 208,634
Accounting Standards Update 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash, cash equivalents and restricted cash	$ 23,600	$ 38,400	$ 37,600