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Commitments and Contingencies - Additional Information (Details) (Subsequent Event [Member], Shareholder Litigation in Relation to Acquisition [Member])
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1 Months Ended |
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Apr. 30, 2015
complaint
shareholder
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Subsequent Event [Member] | Shareholder Litigation in Relation to Acquisition [Member]
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| Loss Contingencies [Line Items] | |
| Number of plaintiffs | 4 |
| Number of class action complaints | 4 |