Commitments and Contingencies - Additional Information (Details) - USD ($)		12 Months Ended
	Jul. 01, 2019	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Lessee, Lease, Description [Line Items]
Lease, Practical Expedients, Package [true false]	true
Operating lease asset		$ 7,373,000	$ 7,395,000
Annual minimum rent		$ 288,000
Operating lease term		99 years
Operating Lease Payments		$ 288,000	240,000
Operating lease expense		316,000	$ 315,000	$ 330,000
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Lease, Practical Expedients, Package [true false]	true
Operating lease asset	$ 7,700,000
Operating lease liability	$ 7,700,000
Employment agreement | CEO
Lessee, Lease, Description [Line Items]
Annual salary commitment		$ 838,000
Termination pay commitment rate applied to the average of the prior five calendar years compensation		299.00%
Employment agreement | SVP of Engineering
Lessee, Lease, Description [Line Items]
Annual salary commitment		$ 347,000