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Net Income (Loss) Per Share
6 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
NET INCOME (LOSS) PER SHARE
NET INCOME (LOSS) PER SHARE
Basic net income or loss per share is based upon the weighted average number of shares of common stock outstanding during the period. Diluted net income per share is based upon the weighted average number of shares of common stock outstanding and the weighted average number of shares outstanding assuming the issuance of common stock upon exercise of stock options and vesting of stock grants per U.S. generally accepted accounting principles, or GAAP. 
 
Three Months Ended
June 30
 
Six Months Ended
June 30
 
2013
 
2012
 
2013
 
2012
Weighted average number of shares outstanding:
 
 
 
 
 
 
 
Common stock
20,136,188

 
20,026,354

 
20,118,152

 
20,008,358

Common stock equivalents-stock options, grants
16,323

 
61,278

 
17,039

 
75,372

Diluted shares outstanding
20,152,511

 
20,087,632

 
20,135,191

 
20,083,730