Principal Business Activities and Summary of Significant Accounting Policies (Details)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of stock options and warrants
Potential common stock equivalents	2,626,533	2,603,885	2,679,660
Common stock options [Member]
Schedule of stock options and warrants
Potential common stock equivalents	2,426,533	2,057,104	2,132,879
Warrants [Member]
Schedule of stock options and warrants
Potential common stock equivalents	200,000	546,781	546,781

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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-Name Accounting Standards Codification

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-Name Accounting Standards Codification

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-Name Accounting Standards Codification

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-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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-Name Accounting Standards Codification

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+ Details