Income Taxes (Narrative) (Details) - USD ($)		12 Months Ended
Jul. 01, 2022	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Valuation Allowance [Line Items]
Statutory income tax rate		28.00%	28.00%	28.00%
Unrecognized tax benefit		$ 0	$ 0
Income tax expense		327,000	7,560,000	$ 2,656,000
Loss before income taxes		(39,900,000)	(5,619,000)	(65,016,000)
Foreign tax credits generated-United States		62,000	10,000	72,000
Capital gains related to disposal of FIHRST and sale of DNI reduced by utilizing capital loss carryforwards				$ 0
Deferred tax assets		3,862,000	747,000
Unused foreign tax credits		$ 0	$ 0
Effective tax rate		(0.83%)	(134.55%)	(4.09%)
Changes in enacted tax rate		$ 0	$ 0	$ 0
Valuation allowance		$ 117,101,000	$ 118,777,000
South Africa [Member]
Valuation Allowance [Line Items]
Statutory income tax rate		28.00%	28.00%	28.00%
Loss before income taxes		$ (31,266,000)	$ (30,825,000)	$ (26,230,000)
Tax rate used to measure deferred tax liability			21.00%
South Africa [Member] \| Subsequent Event [Member]
Valuation Allowance [Line Items]
Statutory income tax rate	27.00%
Cell C [Member]
Valuation Allowance [Line Items]
Fair value of investment		0.0	$ 0.0
CPS [Member]
Valuation Allowance [Line Items]
Fair value of investment		$ 0.0	$ 0.0

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