Stockholders' Equity - Special Participation Stock - Additional Information (Detail) (USD $)
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1 Months Ended | 12 Months Ended | ||
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Jul. 31, 2013
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Dec. 31, 2013
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Dec. 31, 2014
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Nov. 30, 2013
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Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items] | ||||
Number of shares of Special Participation Stock authorized for issuance | 5,000,000 | 5,000,000 | 5,000,000 | |
Outstanding shares of Special Participation Stock | 0 | 0 | ||
Special Participation Shares [Member] | ||||
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items] | ||||
Number of shares of Special Participation Stock authorized for issuance | 10,000 | |||
Share price (in dollars per share) | 0.0001 | |||
Number of shares of common stock Issued in settlement of outstanding shares of Special Participation Stock | 12,121 | (10,000) | ||
Outstanding shares of Special Participation Stock | 0 | 0 |