Summary of Significant Accounting Policies - Narrative (Details) shares in Thousands			3 Months Ended		6 Months Ended
	Dec. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2023 USD ($) segment region shares	Dec. 31, 2022 USD ($) shares
Concentration Risk [Line Items]
Foreign currency transaction gain (loss), realized			$ 37,000	$ 200,000	$ (100,000)	$ (300,000)
Bad debt expenses			0	0	0	0
Inventory valuation reserves	$ 1,300,000	$ 1,300,000	1,300,000		1,300,000
Deferred revenue	$ 900,000	800,000	900,000		900,000
Revenue recognized related to accrued loyalty points			$ 100,000	(100,000)	$ (40,000)	(100,000)
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%		100.00%
Handling and restocking fee, percentage (as a percent)	10.00%		10.00%		10.00%
Return liability reserve	$ 100,000	100,000	$ 100,000		$ 100,000
Research and development			100,000	200,000	300,000	300,000
Present value of lease liabilities	13,779,000		13,779,000		13,779,000
Loss on contract termination				400,000		400,000
Income tax expense			$ (456,000)	$ (17,000)	$ (256,000)	$ 225,000
Antidilutive securities excluded from EPS calculation (in shares) | shares			26	200	100	400
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		$ 0
Cash accounts held primarily at One Financial Institution
Concentration Risk [Line Items]
Concentration of credit risk	12,600,000	17,000,000
Cash held primarily at Other Financial Institutions
Concentration Risk [Line Items]
Concentration of credit risk	$ 4,700,000	$ 4,600,000