Stock Options, Stock Purchase Plan and Warrants (Details 1) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Status of our stock options and stock awards
Stock options, beginning balance	4,779,170	5,470,044
Stock options, granted	1,298,000	519,000
Stock options, exercised	(197,209)	(382,500)
Stock options, cancelled	(102,747)	(827,374)
Stock options, ending balance	5,777,214	4,779,170
Stock options, exercisable, ending balance	4,074,834
Weighted average exercise price, beginning balance	$ 0.87	$ 0.87
Weighted average exercise price, granted	$ 0.73	$ 0.51
Weighted average exercise price, exercised	$ 1.02	$ 0.95
Weighted average exercise price, cancelled	$ 1.60	$ 1.15
Weighted average exercise price, ending balance	$ 1.02	$ 0.87
Weighted average exercise price, exercisable, ending balance	$ 0.79

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.

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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.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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