NOTE S  SEGMENT AND RELATED INFORMATION We have identified two operating segments and both performance evaluation and resource allocation decisions are determined based on each operating segments income from operations. The operating segments are described further below: Patient Care  This segment consists of (i) our owned and operated patient care clinics and Dosteon, and (ii) our contracting and network management business. Dosteon is presented as a discontinued operation and has therefore been excluded from the summarized financial information below. See Note U - Discontinued Operations within these consolidated financial statements. The patient care clinics provide services to design and fit O&amp;P devices to patients. These clinics also instruct patients in the use, care, and maintenance of the devices. The principal reimbursement sources for our services are:  Commercial private payors and other, which consist of individuals, rehabilitation providers, commercial insurance companies, HMOs, PPOs, hospitals, vocational rehabilitation, workers compensation programs, and similar sources;  Medicare, a federally funded health insurance program providing health insurance coverage for persons aged 65 or older and certain disabled persons, which provides reimbursement for O&amp;P products and services based on prices set forth in published fee schedules with 10 regional pricing areas for prosthetics and orthotics and by state for durable medical equipment;  Medicaid, a health insurance program jointly funded by federal and state governments providing health insurance coverage for certain persons in financial need, regardless of age, which may supplement Medicare benefits for financially needy persons aged 65 or older; and  U.S. Department of Veterans Affairs. Our contract and network management business, known as Linkia, is the only network management company dedicated solely to serving the O&amp;P market and is focused on managing the O&amp;P services of national and regional insurance companies. We partner with healthcare insurance companies by securing a national or regional contract either as a preferred provider or to manage their O&amp;P network of providers. Products &amp; Services  This segment consists of our distribution business, which distributes and fabricates O&amp;P products and components to sell to both the O&amp;P industry and our own patient care clinics, and our therapeutic solutions business. The therapeutic solutions business leases and sells rehabilitation equipment and ancillary consumable supplies combined with equipment maintenance, education, and training. This segment also develops emerging neuromuscular technologies for the O&amp;P and rehabilitation markets. Corporate &amp; Other  This consists of corporate overhead and includes unallocated expense such as personnel costs, professional fees, and corporate offices expenses. The accounting policies of the segments are the same as those described in Note A -  Organization and Summary of Significant Accounting Policies. Intersegment revenue primarily relates to sales of O&amp;P components from the Products &amp; Services segment to the Patient Care segment. The sales are priced at the cost of the related materials plus overhead. We had no foreign and export sales and assets for the years ended December 31, 2018, 2017, and 2016. For the Patient Care segment, government reimbursement, comprised of Medicare, Medicaid, and the U.S. Department of Veterans Affairs, in the aggregate, accounted for approximately, 56.5%, 54.8%, and 54.1% of their net revenue in 2018, 2017, and 2016, respectively. Additionally, for the Products &amp; Services segment, no single customer accounted for more than 10% of net revenues in 2018, 2017, or 2016, respectively. Summarized financial information concerning our reporting segments is shown in the following tables. Patient Care Products &amp; Services For the Year Ended December 31, For the Year Ended December 31, (in thousands) 2018 2017 2016 2018 2017 2016 Net revenue Third party $ 857,382 $ 851,973 $ 840,130 $ 191,378 $ 188,796 $ 201,924 Intersegments    192,096 178,768 175,539 Total net revenue 857,382 851,973 840,130 383,474 367,564 377,463 Material costs Third party suppliers 234,409 228,091 230,957 103,608 101,132 101,114 Intersegments 23,792 23,808 25,055 168,304 154,960 150,484 Total material costs 258,201 251,899 256,012 271,912 256,092 251,598 Personnel expenses 312,736 312,695 315,892 51,353 48,395 47,645 Other expenses 140,527 143,598 150,604 24,306 25,855 32,228 Depreciation &amp; amortization 19,113 21,363 24,873 10,197 10,163 11,600 Impairment of intangible assets    183 54,735 86,164 Segment income (loss) from operations $ 126,805 $ 122,418 $ 92,749 $ 25,523 $ (27,676) $ (51,772) Purchase of property, plant and equipment $ 12,781 $ 8,163 $ 14,581 $ 1,890 $ 2,153 $ 820 A reconciliation of the total of the reportable segments' income (loss) from operations to consolidated loss from operations is as follows: (in thousands) 2018 2017 2016 Income (loss) from operations Patient Care $ 126,805 $ 122,418 $ 92,749 Products &amp; Services 25,523 (27,676) (51,772) Corporate &amp; other (92,681) (113,692) (112,277) Consolidated income (loss) from operations 59,647 (18,950) (71,300) Interest expense, net 37,566 57,688 45,199 Loss on extinguishment of debt 16,998  6,031 Non-service defined benefit plan expense 703 736 786 Income (loss) from continuing operations before income taxes 4,380 (77,374) (123,316) Provision (benefit) for income taxes 5,238 27,297 (15,910) Consolidated loss from continuing operations $ (858) $ (104,671) $ (107,406) A reconciliation of the reportable segment net revenue to consolidated net revenue is as follows: (in thousands) 2018 2017 2016 Net Revenue Patient Care $ 857,382 $ 851,973 $ 840,130 Products &amp; Services 383,474 367,564 377,463 Corporate &amp; other    Consolidating adjustments (192,096) (178,768) (175,539) Consolidated net revenue $ 1,048,760 $ 1,040,769 $ 1,042,054 A reconciliation of the reportable segment material costs to consolidated material costs is as follows: (in thousands) 2018 2017 2016 Material costs Patient Care $ 258,201 $ 251,899 $ 256,012 Products &amp; Services 271,912 256,092 251,598 Corporate &amp; other    Consolidating adjustments (192,096) (178,768) (175,539) Consolidated material costs $ 338,017 $ 329,223 $ 332,071 A reconciliation of the reportable segment purchase of property, plant and equipment to consolidated purchase of property, plant and equipment is as follows: (in thousands) 2018 2017 2016 Purchase of property, plant and equipment Patient Care $ 12,781 $ 8,163 $ 14,581 Products &amp; Services 1,890 2,153 820 Corporate &amp; other 4,313 6,039 5,747 Total consolidated purchase of property, plant and equipment $ 18,984 $ 16,355 $ 21,148 A reconciliation of the total of the reportable segments' assets to consolidated assets is as follows: (in thousands) 2018 2017 Assets Patient Care $ 415,469 $ 413,759 Products &amp; Services 100,953 97,536 Corporate &amp; other 186,588 129,128 Total consolidated assets $ 703,010 $ 640,423