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BALANCE SHEET COMPONENTS | 12 Months Ended
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Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
BALANCE SHEET COMPONENTS | (3) BALANCE SHEET COMPONENTS The components of certain balance sheet line items are as follows (in thousands):
|  | December 31, |
|  | 2017 |  | 2016 |
Property and equipment: |  |  |  |  |  |  |
Office furniture and equipment |  | $ | 998 |  | $ | 911 |
Rental inventory |  |  | - |  |  | 1,411 |
Assembly equipment |  |  | 128 |  |  | 125 |
Vehicles |  |  | 76 |  |  | 76 |
|  |  | 1,202 |  |  | 2,523 |
Less accumulated depreciation |  |  | (1,014) |  |  | (1,943) |
|  | $ | 188 |  | $ | 580 |
|  | December 31, |
|  | 2017 |  | 2016 |
Assets acquired under capital lease: |  |  |  |  |  |  |
Original book value |  | $ | 461 |  | $ | 461 |
Accumulated depreciation |  |  | (379) |  |  | (287) |
Net book value |  | $ | 82 |  | $ | 174 |
Depreciation expense recorded was $0.3 million and $0.4 million for the years ended December 31, 2017 and 2016, respectively. Included in computer and office &; manufacturing equipment at December 31, 2017 and 2016 are assets under capital lease. Depreciation expense related to assets under capital leases was $0.1 million for the years ended December 31, 2017 and 2016, respectively. During the year ending December 31, 2017 Rental inventory was written off and going forward, units will be fully expensed when they leave the facility on the initial purchase. Depreciation expense related to rental inventory was $0.1 million and $0.3 million for the years ended December 31, 2017 and 2016, respectively.

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI http://asc.fasb.org/topic&trid=2122208 + Details
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