Stockholders' Equity (Deficit) and Redeemable Instruments - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended	0 Months Ended
Dec. 31, 2014	Dec. 11, 2014	Dec. 31, 2013
Statement Of Shareholders Equity [Line Items]
Share repurchase, amount	$ 5,283
Preferred stock, shares authorized	5,000,000us-gaap_PreferredStockSharesAuthorized		0us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued		0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding	0us-gaap_PreferredStockSharesOutstanding		0us-gaap_PreferredStockSharesOutstanding
Common stock, par value	$ 0.01		$ 0.01
Common stock, shares authorized	100,000,000us-gaap_CommonStockSharesAuthorized		27,200,862us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	31,839,087us-gaap_CommonStockSharesIssued		16,183,901us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	31,539,087us-gaap_CommonStockSharesOutstanding		16,183,901us-gaap_CommonStockSharesOutstanding
Treasury stock, shares	300,000us-gaap_TreasuryStockShares		0us-gaap_TreasuryStockShares
Cetus Capital II, LLC [Member]
Statement Of Shareholders Equity [Line Items]
Share repurchase, shares	300,000
Share repurchase, amount	$ 5,283
Share repurchase, price per share		$ 17.61

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Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time.

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Face amount or stated value per share of common stock.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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