SEGMENT REPORTING We have three reportable segments: 3D Manufacturing, Construction BIM, and Emerging Verticals. These segments are based upon the vertical markets that we currently serve. Business activities that do not meet the criteria to be reportable segments are aggregated in the Emerging Verticals segment. We develop, manufacture, market, support and sell CAD-based quality assurance products integrated with CAD-based inspection and statistical process control software and 3D documentation systems in each of these reportable segments. These activities represent more than 99% of consolidated sales. Our Chief Operating Decision Maker (CODM), our Chief Executive Officer, evaluates segment performance and allocates resources based upon profitable growth. We use segment profit to evaluate the performance of our reportable segments. Segment profit is calculated as gross profit, net of selling and marketing expenses, for the reporting segment. Our definition of segment profit may not be comparable to similarly titled measures reported by other companies. Our segment structure presented below represents a change from the prior year as further described in Note 1  Description of Business. The amounts for the three and six months ended June 30, 2018 have been restated to reflect the change in our reporting segments. Each of our reporting segments continues to employ consistent accounting policies. The following tables present information about our reportable segments, including a reconciliation of segment profit to income from operations included in the condensed consolidated statements of operations for the three and six months ended June 30, 2019 and 2018: 3D Manufacturing Construction BIM Emerging Verticals Total Three Months Ended June 30, 2019 Total sales $ 59,002 $ 24,161 $ 10,328 $ 93,491 Segment profit (loss) $ 17,819 $ 6,574 $ (1,198 ) $ 23,195 General and administrative 14,424 Depreciation and amortization 4,573 Research and development 9,091 Loss from operations $ (4,893 ) 3D Manufacturing Construction BIM Emerging Verticals Total Three Months Ended June 30, 2018 Total sales $ 63,989 $ 23,567 $ 10,688 $ 98,244 Segment profit $ 20,898 $ 5,865 $ 844 $ 27,607 General and administrative 11,320 Depreciation and amortization 4,377 Research and development 9,983 Income from operations $ 1,927 3D Manufacturing Construction BIM Emerging Verticals Total Six Months Ended June 30, 2019 Total sales $ 115,569 $ 49,600 $ 21,939 $ 187,108 Segment profit (loss) $ 36,989 $ 15,000 $ (528 ) $ 51,461 General and administrative 27,648 Depreciation and amortization 9,322 Research and development 19,026 Loss from operations $ (4,535 ) 3D Manufacturing Construction BIM Emerging Verticals Total Six Months Ended June 30, 2018 Total sales $ 124,646 $ 46,249 $ 20,183 $ 191,078 Segment profit $ 39,322 $ 12,316 $ 1,484 $ 53,122 General and administrative 22,393 Depreciation and amortization 8,720 Research and development 19,389 Income from operations $ 2,620