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Organization and Summary of Significant Accounting Policies (Equity Compensation) (Details) | 12 Months Ended
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Dec. 31, 2017
Restricted stock |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 3 years
Employee stock option |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 4 years

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- Details
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