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Property and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment at cost | $ 5,258 | $ 3,130 |
Less: accumulated depreciation | (2,829) | (2,674) |
Property, Plant and Equipment, Net | 2,429 | 456 |
Depreciation | $ 266 | 184 | $ 615
Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment, useful life | 2 years |  |
Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment, useful life | 15 years |  |
Equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment at cost | $ 2,864 | $ 1,289 |
Equipment | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment, useful life | 3 years | 3 years |
Equipment | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment, useful life | 15 years | 15 years |
Tooling |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment at cost | $ 851 | $ 851 |
Tooling | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment, useful life | 2 years | 2 years |
Tooling | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment, useful life | 5 years | 5 years |
Vehicles |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment at cost | $ 39 | $ 0 |
Property and equipment, useful life | 5 years | 5 years |
Furniture and fixtures |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment at cost | $ 104 | $ 85 |
Property and equipment, useful life | 5 years | 5 years |
Computer software |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment at cost | $ 581 | $ 378 |
Property and equipment, useful life | 3 years | 3 years |
Leasehold improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment at cost | $ 509 | $ 509 |
Construction in progress |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment at cost | $ 310 | $ 18 |

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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 14 -Article 5 + Details
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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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