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10. STOCKHOLDERS' EQUITY
 6 Months Ended
Jun. 30, 2015
Equity [Abstract]  
10. STOCKHOLDERS' EQUITY

Common Stock

 

The number of shares of common stock outstanding is as follows:

 

Balance, December 31, 2014   15,131 
Shares surrendered by employees related to payroll taxes on vested restricted stock awards   (99)
Balance, June 30, 2015   15,032