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Property and Equipment, net (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Property and Equipment, Net [Abstract] |  |  |  |  |  |
Property and equipment, gross |  | $ 46,654 |  | $ 46,654 |  | $ 45,465
Less: accumulated depreciation and amortization |  | (34,443) |  | (34,443) |  | (32,005)
Total property and equipment, net |  | 12,211 |  | 12,211 |  | 13,460
Property Plant and Equipment Income Statement Disclosures [Abstract] |  |  |  |  |  |
Total depreciation and amortization |  | 733 | $ 944 | 2,438 | $ 2,797 |
Machinery [Member] |  |  |  |  |  |
Property and Equipment, Net [Abstract] |  |  |  |  |  |
Property and equipment, gross |  | 20,440 |  | $ 20,440 |  | 20,056
Machinery [Member] | Minimum [Member] |  |  |  |  |  |
Property and Equipment, Net [Abstract] |  |  |  |  |  |
Useful lives |  |  |  | 3 years |  |
Machinery [Member] | Maximum [Member] |  |  |  |  |  |
Property and Equipment, Net [Abstract] |  |  |  |  |  |
Useful lives |  |  |  | 15 years |  |
Furniture and Fixtures [Member] |  |  |  |  |  |
Property and Equipment, Net [Abstract] |  |  |  |  |  |
Property and equipment, gross |  | 1,142 |  | $ 1,142 |  | 1,109
Furniture and Fixtures [Member] | Minimum [Member] |  |  |  |  |  |
Property and Equipment, Net [Abstract] |  |  |  |  |  |
Useful lives |  |  |  | 3 years |  |
Furniture and Fixtures [Member] | Maximum [Member] |  |  |  |  |  |
Property and Equipment, Net [Abstract] |  |  |  |  |  |
Useful lives |  |  |  | 15 years |  |
Leasehold Improvements [Member] |  |  |  |  |  |
Property and Equipment, Net [Abstract] |  |  |  |  |  |
Property and equipment, gross | [1] | 21,314 |  | $ 21,314 |  | 21,271
Computer, Network Equipment and Software [Member] |  |  |  |  |  |
Property and Equipment, Net [Abstract] |  |  |  |  |  |
Property and equipment, gross |  | 2,287 |  | $ 2,287 |  | 2,108
Computer, Network Equipment and Software [Member] | Minimum [Member] |  |  |  |  |  |
Property and Equipment, Net [Abstract] |  |  |  |  |  |
Useful lives |  |  |  | 3 years |  |
Computer, Network Equipment and Software [Member] | Maximum [Member] |  |  |  |  |  |
Property and Equipment, Net [Abstract] |  |  |  |  |  |
Useful lives |  |  |  | 7 years |  |
Construction in Progress [Member] |  |  |  |  |  |
Property and Equipment, Net [Abstract] |  |  |  |  |  |
Property and equipment, gross |  | $ 1,471 |  | $ 1,471 |  | $ 921
[1] | Leasehold improvements are amortized over the shorter of the lease term or their estimated useful lives.

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