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Business Segmentation and Geographical Distribution
3 Months Ended
Mar. 31, 2015
Segment Reporting [Abstract]  
Business Segmentation and Geographical Distribution

(8) Business Segmentation and Geographical Distribution

Revenue from international sources approximated $375 and $111 for the three months ended March 31, 2015 and 2014, respectively. All of this revenue was product revenue.

Our operations comprise a single business segment and all of our long-lived assets are located within the United States.