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Stock Options (Details 2) (Stock options, USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Stock options |  |
Non-vested share-based payment activity with employees |  |
Number of non-vested options outstanding at the beginning of the period (in shares) | 858,115 | 1,263,205
Number of non-vested options granted (in shares) | 261,000 | 267,576
Number of options vested (in shares) | (385,076) | (317,734)
Number of non-vested options forfeited (in shares) | (58,843) | (354,932)
Number of non-vested options outstanding at the end of the period (in shares) | 675,196 | 858,115
Weighted average grant-date fair value of non-vested options outstanding at the beginning of the period (in dollars per share) | $ 2.36 | $ 1.41
Weighted average grant-date fair value of options granted (in dollars per share) | $ 3.72 | $ 2.99
Weighted average grant-date fair value of options vested (in dollars per share) | $ (2.22) | $ (1.92)
Weighted average grant-date fair value of non-vested options forfeited (in dollars per share) | $ (3.48) | $ (2.48)
Weighted average grant-date fair value of non-vested options outstanding at the end of the period (in dollars per share) | $ 2.88 | $ 2.36

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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition Number of non-vested options forfeited. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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- Definition Number of options vested. + References No definition available. + Details
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