Summary of Significant Accounting Policies - Narrative (Details) shares in Millions	12 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2022 USD ($) lease	Jun. 30, 2022 USD ($) shares	Jun. 30, 2022 USD ($) segment	Jun. 30, 2022 USD ($) region	Jun. 30, 2021 USD ($) shares	Jun. 30, 2020 USD ($) shares	Jul. 01, 2019 USD ($)	Jun. 30, 2019 USD ($)
Summary of Significant Accounting Policies Additional Information [Abstract]
Recorded bad debt expense	$ 0					$ 0	$ 0
Reduction in inventory	(1,300,000)	$ (1,300,000)	$ (1,300,000)	$ (1,300,000)	$ (1,300,000)	500,000
Impairment of intangible assets	0					0
Research and development	700,000					$ 700,000	$ 900,000
Number of finance leases | lease		0
Number of antidilutive securities (in shares) | shares			0.2			0.1	0.1
Number of geographic segments				2	2
Lease liabilities	15,755,000	$ 15,755,000	$ 15,755,000	$ 15,755,000	$ 15,755,000
Right-of-use assets	11,040,000	11,040,000	11,040,000	11,040,000	11,040,000	$ 13,700,000
Stockholders' equity attributable to parent	31,516,000	$ 31,516,000	$ 31,516,000	$ 31,516,000	$ 31,516,000	$ 36,807,000	$ 33,254,000		$ 27,199,000
Cumulative effect of adoption of accounting principle
Summary of Significant Accounting Policies Additional Information [Abstract]
Lease liabilities								$ 3,900,000
Right-of-use assets								3,300,000
Stockholders' equity attributable to parent								$ 500,000	$ 508,000
Cash Accounts Held Primarily At Financial Institution
Summary of Significant Accounting Policies Additional Information [Abstract]
Concentration of credit risk	15,400,000
Cash Accounts Held at Other Financial Institutions
Summary of Significant Accounting Policies Additional Information [Abstract]
Concentration of credit risk	$ 4,800,000