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Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Property, plant and equipment [Abstract] |  |  |
Property, plant and equipment, net | $ 42,255 |  | $ 27,805
Depreciation and amortization | 3,361 | $ 3,620 |
Machinery and equipment |  |  |
Property, plant and equipment [Abstract] |  |  |
Property, plant and equipment, gross | 42,970 |  | 41,254
Less: accumulated depreciation and amortization | (40,017) |  | (37,311)
Building |  |  |
Property, plant and equipment [Abstract] |  |  |
Property, plant and equipment, gross | 31,327 |  | 29,600
Less: accumulated depreciation and amortization | (10,951) |  | (9,654)
Leasehold improvements |  |  |
Property, plant and equipment [Abstract] |  |  |
Property, plant and equipment, gross | 5,351 |  | 4,942
Less: accumulated depreciation and amortization | (4,093) |  | (3,608)
Construction in progress |  |  |
Property, plant and equipment [Abstract] |  |  |
Property, plant and equipment, gross | 17,668 |  | $ 2,582
Construction in progress Dingxin location |  |  |
Property, plant and equipment [Abstract] |  |  |
Property, plant and equipment, gross | 13,600 |  |
Construction in progress manufacturing equipment purchases |  |  |
Property, plant and equipment [Abstract] |  |  |
Property, plant and equipment, gross | 1,500 |  |
Construction in progress other consolidated subsidiaries |  |  |
Property, plant and equipment [Abstract] |  |  |
Property, plant and equipment, gross | $ 2,600 |  |

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