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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Stockholders' equity:
Common stock, par value (in dollars per share)	$ 0.01us-gaap_CommonStockParOrStatedValuePerShare	$ 0.01us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized (in shares)	125,000,000us-gaap_CommonStockSharesAuthorized	125,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares outstanding (in shares)	30,024,535us-gaap_CommonStockSharesOutstanding	27,995,638us-gaap_CommonStockSharesOutstanding
Treasury stock, shares (in shares)	865us-gaap_TreasuryStockNumberOfSharesHeld	865us-gaap_TreasuryStockNumberOfSharesHeld

X

- Definition

Face amount or stated value per share of common stock.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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X

- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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X

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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- Definition

Number of shares held for each class of treasury stock.

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