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STOCK-BASED COMPENSATION (Detail Textuals 1) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]        
Options exercised for the purchase of common stock 9,800 193,717 62,475 298,652
Weighted-average exercise price $ 5.49 $ 6.13 $ 5.61 $ 6.02