Summary of Significant Accounting Policies - Narrative (Details) shares in Thousands			3 Months Ended		9 Months Ended
	Dec. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2024 USD ($) shares	Mar. 31, 2023 USD ($) shares	Mar. 31, 2024 USD ($) segment region shares	Mar. 31, 2023 USD ($) shares
Concentration Risk [Line Items]
Foreign currency transaction gain (loss), realized			$ (100,000)	$ 36,000	$ (200,000)	$ (200,000)
Bad debt expenses			0	0	0	0
Inventory valuation reserves		$ 1,300,000	1,300,000		1,300,000
Deferred revenue		800,000	700,000		700,000
Revenue recognized related to accrued loyalty points			$ (200,000)	100,000	$ (100,000)	300,000
Money back guarantee period					30 days
Return period for resalable and restockable Items					12 months
Refund percent for resalable and restockable Items			100.00%		100.00%
Handling and restocking fee, percentage (as a percent)			10.00%		10.00%
Return liability reserve		100,000	$ 100,000		$ 100,000
Research and development			200,000	200,000	500,000	400,000
Present value of lease liabilities			13,527,000		13,527,000
Loss on contract termination				400,000		400,000
Income tax expense			$ 262,000	$ 643,000	$ 7,000	$ 869,000
Antidilutive securities excluded from EPS calculation (in shares) | shares			8	100	34	300
Number of geographic segments | region					2
Number of operating segments | segment					1
HONG KONG
Concentration Risk [Line Items]
Present value of lease liabilities			$ 0		$ 0
Cash accounts held primarily at One Financial Institution
Concentration Risk [Line Items]
Concentration of credit risk	$ 13,100,000	17,000,000
Cash held primarily at Other Financial Institutions
Concentration Risk [Line Items]
Concentration of credit risk	$ 4,300,000	$ 4,600,000