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Supplemental Disclosure of Cash Flow Information (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Cash paid during the period for:    
Income taxes $ 226 $ 81
Interest 74 73
Non-cash investing and financing activities:    
Acquisitions of property and equipment and other assets under extended payment terms $ 143 $ 2,825