Goodwill And Intangible Assets, Net (Carrying Value And Accumulated Amortization Of Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Jun. 30, 2021
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross carrying value	$ 14,686	$ 16,760
Accumulated amortization	(14,388)	(16,403)
Total future estimated amortization expense	298	357
Total intangible assets, Net carrying value	298	357
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross carrying value	9,683	10,340
Accumulated amortization	(9,683)	(10,340)
Total future estimated amortization expense	0	0
Software And Unpatented Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross carrying value	390	1,726
Accumulated amortization	(390)	(1,726)
Total future estimated amortization expense	0	0
FTS Patent [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross carrying value	2,633	2,679
Accumulated amortization	(2,633)	(2,679)
Total future estimated amortization expense	0	0
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross carrying value	1,980	2,015
Accumulated amortization	(1,682)	(1,658)
Total future estimated amortization expense	$ 298	$ 357