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4. Net Income (loss) Per Common Share (Details)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Details
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	317,000	313,000	293,750
Convertible Preferred Stock, Shares Outstanding	375
Convertible Preferred Stock, Shares Issued upon Conversion	773,000	350,140

- Definition

Number of shares issued for each share of convertible preferred stock that is converted.

+ References+ Details

- Definition

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.

+ References+ Details