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Stockholders' Equity - Additional Information (Detail) (USD $)
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12 Months Ended | 0 Months Ended | |
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Dec. 31, 2014
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Dec. 31, 2013
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Jul. 27, 2010
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| Stockholders Equity Note [Line Items] | |||
| Number of shares of common stock to be purchased by issuing warrants | 250,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights | ||
| Exercise price of stock warrants | $ 9.60us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 | 9.60us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 | |
| Date from which warrants or rights exercisable | Oct. 14, 2010 | ||
| Warrants expiration date | Oct. 14, 2015 | ||
| Fair value of warrants outstanding | $ 2,000us-gaap_WarrantsAndRightsOutstanding | 2,000,000us-gaap_WarrantsAndRightsOutstanding | |
| Dividend yield | 1.27%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate | 1.61%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate | |
| Outstanding stock warrants | 0us-gaap_ClassOfWarrantOrRightOutstanding | ||
| Stock warrants [Member] | |||
| Stockholders Equity Note [Line Items] | |||
| Percentage of weighted average expected stock volatility for warrant |
111.46%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
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| Contract term of expected life assumption | 5 years | ||
| Percentage of risk free rate for warrants |
2.07%us-gaap_FairValueAssumptionsRiskFreeInterestRate / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
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| Dividend yield |
0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
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- Definition
Class of warrants or rights expiration date. No definition available.
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- Details
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- Definition
Date the warrants or rights are exercisable, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Risk-free interest rate assumption used in valuing an instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Weighted average expected volatility of stock price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
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
Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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