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The Company and Summary of Significant Accounting Policies - Accounts Receivable and Allowance for Doubtful Accounts and Sales Returns (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
The Company and Summary of Significant Accounting Policies    
Accounts receivable $ 25,640,000 $ 19,256,000
Allowance for Doubtful Accounts    
The Company and Summary of Significant Accounting Policies    
Valuation allowance balance 147,000 579,000
Increase/ (decrease) in allowance for doubtful accounts (432,000) 272,000
Allowance for Sales Returns    
The Company and Summary of Significant Accounting Policies    
Valuation allowance balance 28,000 39,000
Allowance utilized 28,000 39,000
Additional reduction $ 17,000 $ 34,000