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Stockholders' Equity (Details 2) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Shares Exercisable, beginning of period (in shares) | 86,625 | 110,625
Shares, Vested (in shares) | 12,250 | 22,250
Shares, Exercised (in shares) | (49,000) | (4,000)
Shares, Cancelled (in shares) | (2,875) | (42,250)
Shares Exercisable at the end of period (in shares) | 47,000 | 86,625
Weighted Average Exercise Price, Exercisable, beginning of period (in dollars per share) | $ 2.61 | $ 3.36
Weighted Average Exercise Price, Vested (in dollars per share) | $ 5.97 | $ 2.97
Weighted Average Exercise Price, Exercised (in dollars per share) | $ 1.94 | $ 2.49
Weighted Average Exercise Price, Cancelled (in dollars per share) | $ 5.10 | $ 4.78
Weighted Average Exercise Price, Exercisable at the end of period (in dollars per share) | $ 4.03 | $ 2.61
Shares Outstanding, beginning of period (in shares) | 162,500 | 202,750
Shares, Granted (in shares) | 109,000 | 8,000
Shares Exercised (in shares) | (49,000) | (4,000)
Shares Cancelled (in shares) | (4,000) | (44,250)
Shares Outstanding at the end of period (in shares) | 218,500 | 162,500
Weighted Average Exercise Price, Outstanding, beginning of period (in dollars per share) | $ 4.25 | $ 4.28
Weighted Average Exercise Price, Granted (in dollars per share) | $ 5.17 | $ 5.96
Weighted Average Exercise Price, Exercised (in dollars per share) | $ 1.94 | $ 2.49
Weighted Average Exercise Price, Cancelled (in dollars per share) | $ 5.35 | $ 4.84
Weighted Average Exercise Price, Outstanding at the end of period (in dollars per share) | $ 5.21 | $ 4.25

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(c), d(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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