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The Company and Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
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The Company and Summary of Significant Accounting Policies |  |
Accounts receivable | $ 19,586,000 | $ 22,778,000
Accrued liabilities | 15,371,000 | $ 11,149,000
Adjustment | ASU 2014-09 |  |
The Company and Summary of Significant Accounting Policies |  |
Accounts receivable | 169,000 |
Accrued liabilities | $ 169,000 |

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