Nature of Business and Summary of Significant Accounting Policies (Details)		3 Months Ended
	Jul. 01, 2019 USD ($)	Sep. 30, 2021 USD ($) segment	Sep. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)
Nature of Business and Summary of Significant Accounting Policies
Cash and cash equivalents, short term deposits		$ 63,000		$ 63,000
Allowance for doubtful		226,000		226,000
Stock based compensation expense		$ 89,000	$ 104,000
Number of share incentive programs		four
Foreign currency realized/unrealized gains(loss)		$ 0	$ 0
Operating segments (in segments) | segment		1
Operating lease liability	$ 7,700,000
Operating lease asset	$ 7,700,000	$ 7,367,000		$ 7,373,000
Lease, Practical Expedients, Package [true false]	true
Payment terms (in days)		30 and 180
Warranty term (in months)		24 to 36