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Summary of Significant Accounting Policies - Narrative (Details)
shares in Millions
 3 Months Ended
Mar. 31, 2023
USD ($)
Jun. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
region
segment
shares
Sep. 30, 2022
USD ($)
shares
Jun. 30, 2023
USD ($)
Concentration Risk [Line Items]          
Foreign currency transaction gain (loss), realized     $ (100,000) $ 400,000  
Bad debt expenses     0 0  
Inventory valuation reserves     1,300,000   $ 1,300,000
Deferred revenue     1,000,000   800,000
Revenue recognized related to accrued loyalty points     $ (200,000) (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%    
Handling and restocking fee, percentage (as a percent)     10.00%    
Return liability reserve     $ 100,000   $ 100,000
Research and development     200,000 100,000  
Income tax expense     $ 200,000 $ 242,000  
Antidilutive securities excluded from EPS calculation (in shares) | shares     0.3 0.6  
Number of geographic segments | region     2    
Number of operating segments | segment     1    
Present value of lease liabilities     $ 14,120,000    
HONG KONG          
Concentration Risk [Line Items]          
Present value of lease liabilities     $ 0    
Cash accounts held primarily at One Financial Institution          
Concentration Risk [Line Items]          
Concentration of credit risk $ 13,300,000 $ 17,000,000      
Cash held primarily at Other Financial Institutions          
Concentration Risk [Line Items]          
Concentration of credit risk $ 5,100,000 $ 4,600,000