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DETAILS OF CERTAIN FINANCIAL STATEMENT COMPONENTS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Inventories |  |
Raw materials | $ 743 | $ 738
Work-in-process | 290 | 357
Finished goods | 162 | 173
Total inventories | 1,195 | 1,268
Property, plant and equipment, net |  |
Property and equipment, Gross | 1,782 | 1,428
Less: accumulated depreciation | (1,257) | (1,118)
Total property, plant and equipment, net | 525 | 310
Depreciation expense | 128 | 57
Retired or disposed of property, plant and equipment, cost | 0 | 0
Intangibles, net |  |
Total intangibles, net | 69 | 44
Amortization expense | 17 | 9
Future amortization |  |
2018 | 19 |
2019 | 17 |
2020 | 16 |
2021 | 14 |
2022 | 3 |
Accrued expenses and other accrued liabilities |  |
Accrued warranty | 3 | 2
Accrued wages and benefits | 185 | 195
Accrued taxes, other than income taxes | 4 | 5
Accrued vacation | 88 | 77
Accrued other | 65 | 55
Total accrued liabilities | 345 | 334
Patents and trademarks |  |
Intangibles, net |  |
Intangibles, gross | 402 | 360
Less: accumulated amortization | (333) | (316)
Total intangibles, net | 69 | 44
Furniture, machinery and equipment |  |
Property, plant and equipment, net |  |
Property and equipment, Gross | 1,231 | 914
Leasehold improvements |  |
Property, plant and equipment, net |  |
Property and equipment, Gross | $ 551 | $ 514

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