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Summary of Significant Accounting Policies, Recent Accounting Pronouncements (Details) - Accounting Standards Update 2016-09 [Member] $ in Thousands | Dec. 31, 2016 USD ($)
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Accounting Pronouncements [Abstract] |
Cumulative adjustment | $ 0
Retained Earnings [Member] |
Accounting Pronouncements [Abstract] |
Cumulative adjustment | (2,800)
Additional Paid-in Capital [Member] |
Accounting Pronouncements [Abstract] |
Cumulative adjustment | $ 2,800

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