Summary of Significant Accounting Policies - Additional Information (Details) (USD $)
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3 Months Ended | 12 Months Ended | 0 Months Ended | ||
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Mar. 25, 2014
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Dec. 31, 2014
Segment
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Dec. 31, 2013
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Dec. 31, 2012
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Mar. 25, 2014
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Summary Of Significant Accounting Policies [Line Items] | |||||
Convertible redeemable preferred stock converted into common stock | 12,115,183us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion | 0us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion | 12,115,183us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion | ||
Common stock, shares authorized | 175,000,000us-gaap_CommonStockSharesAuthorized | 175,000,000us-gaap_CommonStockSharesAuthorized | 14,700,000us-gaap_CommonStockSharesAuthorized | 175,000,000us-gaap_CommonStockSharesAuthorized | |
Preferred stock, shares authorized | 25,000,000us-gaap_PreferredStockSharesAuthorized | 25,000,000us-gaap_PreferredStockSharesAuthorized | 0us-gaap_PreferredStockSharesAuthorized | 25,000,000us-gaap_PreferredStockSharesAuthorized | |
Accretion on preferred stock | $ 86,899,555us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment | $ 86,899,555us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment | $ 55,885,844us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment | $ 3,323,000us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment | |
Number of operating segments | 1us-gaap_NumberOfOperatingSegments | ||||
Significant uncertain tax positions | 0us-gaap_LiabilityForUncertainTaxPositionsCurrent | 0us-gaap_LiabilityForUncertainTaxPositionsCurrent | |||
Revenue | 0us-gaap_Revenues | ||||
Expected dividend yield | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate | ||||
Depreciation expense | 49,363us-gaap_Depreciation | 1,282us-gaap_Depreciation | 0us-gaap_Depreciation | ||
Minimum | |||||
Summary Of Significant Accounting Policies [Line Items] | |||||
Property, plant and equipment, Useful life | 3 years | ||||
Maximum | |||||
Summary Of Significant Accounting Policies [Line Items] | |||||
Property, plant and equipment, Useful life | 7 years | ||||
IPO | |||||
Summary Of Significant Accounting Policies [Line Items] | |||||
Issuance of common stock, shares | 6,762,000us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember |
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Sale of stock, price per share | $ 17.00us-gaap_SaleOfStockPricePerShare / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember |
$ 17.00us-gaap_SaleOfStockPricePerShare / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember |
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Proceeds from issuance of initial public offering | $ 104,364,560us-gaap_ProceedsFromIssuanceInitialPublicOffering / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember |
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Convertible redeemable preferred stock converted into common stock | 12,115,183us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember |
12,115,183us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember |
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Overallotment option granted to underwriters | |||||
Summary Of Significant Accounting Policies [Line Items] | |||||
Issuance of common stock, shares | 879,647us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_OverAllotmentOptionMember |
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- Definition
The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of shares issued for each share of convertible preferred stock that is converted. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The current portion of the amount recognized for uncertain tax positions as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. No definition available.
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- Definition
The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
The cash inflow associated with the amount received from entity's first offering of stock to the public. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. No definition available.
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- Definition
Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. No definition available.
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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of new stock issued during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of decrease to net income for accretion of temporary equity to its redemption value to derive net income apportioned to common stockholders. No definition available.
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