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Stock-Based Compensation
6 Months Ended
Jun. 30, 2013
Stock-Based Compensation [Abstract]  
Stock-Based Compensation

10. Stock-Based Compensation

Stock-based compensation expense for the three and six months ended June 30, 2013 was $593,000 and $1.4 million, respectively. Stock-based compensation expense for the three and six months ended June 30, 2012 was $374,000 and $826,000, respectively. Stock-based compensation expense is included in selling, general and administrative expenses in the Company’s unaudited condensed consolidated statements of operations.