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Property and Equipment | 12 Months Ended
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Dec. 31, 2017
Property and Equipment [Abstract] |
Property and Equipment | 7. PROPERTY AND EQUIPMENT Property and equipment consisted of the following at December 31: ﻿ ﻿
﻿ |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |
﻿ | Estimated Useful Life |  | 2017 |  | 2016
﻿Generators and other capital equipment | 1 - 3 years |  | $ | 15,754 |  | $ | 13,087
﻿Building under capital lease | 15 years |  |  | 14,250 |  |  | 14,250
﻿Computer and other office equipment | 3 years |  |  | 5,873 |  |  | 5,321
﻿Machinery, equipment and vehicles | 3 - 7 years |  |  | 4,576 |  |  | 3,731
﻿Furniture and fixtures | 3 - 7 years |  |  | 4,366 |  |  | 3,676
﻿Leasehold improvements | 5 - 15 years |  |  | 3,636 |  |  | 3,319
﻿Construction in progress | N/A |  |  | 1,810 |  |  | 539
﻿Equipment under capital leases | 3 - 5 years |  |  | 221 |  |  | 215
﻿Total |  |  |  | 50,486 |  |  | 44,138
﻿Less accumulated depreciation |  |  |  | (21,737) |  |  | (14,143)
﻿Property and equipment, net |  |  | $ | 28,749 |  | $ | 29,995
﻿ Property and equipment depreciation expense was $7,761, $7,655 and $4,975 for the years ended December 31, 201 7, 201 6 and 201 5. Depreciation related to generators and other capital equipment was $3,574, $3,591 and $2,944 in 201 7, 201 6 and 201 5. As of December 31, 201 7 and 201 6, the net carrying value of generators and other capital equipment was $4,656 and $5,692.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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