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Organization and Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Customer concentration risk | Revenue | One Customer |  |  |
Product Information [Line Items] |  |  |
Concentration for largest customer | 2.00% | 2.00% | 2.00%

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