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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
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Dec. 31, 2022 | Dec. 31, 2021
The Company and Summary of Significant Accounting Policies |  |
Accounts receivable | $ 29,252,000 | $ 34,839,000
Accrued liabilities | 18,164,000 | 17,057,000
Allowance for Doubtful Accounts |  |
The Company and Summary of Significant Accounting Policies |  |
Valuation allowance balance | 307,000 | 130,000
Increase/ (decrease) in allowance for doubtful accounts | 177,000 | 87,000
Allowance for Sales Returns |  |
The Company and Summary of Significant Accounting Policies |  |
Valuation allowance balance | 112,000 | 48,000
Allowance utilized | 112,000 | 48,000
Additional reduction | $ 176,000 | $ 15,000

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