Annual report pursuant to Section 13 and 15(d)

STOCKHOLDERS' EQUITY - Summary of stock option activity (Details)

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STOCKHOLDERS' EQUITY - Summary of stock option activity (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Granted 925,000 430,000
Options Outstanding
    
Options outstanding at beginning of year 7,208,070 7,947,613
Granted 925,000 430,000
Cancelled/expired/exercised (2,550,570) (1,169,531)
Options outstanding at end of year 5,582,500 7,208,070
Options exercisable at end of year 4,826,250 6,853,903
Weighted Average Exercise Price
    
Options outstanding at beginning of year, exercise price 0.69 0.62
Granted, exercise price 1.24 1.60
Cancelled/expired/exercised, exercise price 0.66 0.55
Options outstanding at end of year, exercise price 0.78 0.69
Options exercisable at end of year, exercise price 0.71 0.65