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Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Property, Plant and Equipment [Line Items] |  |  |  |  |
Finance lease right-of-use asset | $ 13 |  | $ 13 |  | $ 13
Property and equipment at cost | 3,345 |  | 3,345 |  | 3,084
Less: accumulated depreciation | (2,757) |  | (2,757) |  | (2,664)
Property and equipment, net | 588 |  | 588 |  | 420
Depreciation | 43 | $ 48 | 143 | $ 140 |
Equipment |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Property and equipment, gross | 1,308 |  | $ 1,308 |  | 1,281
Equipment | Minimum |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Useful life (in years) |  |  | 3 years |  |
Equipment | Maximum |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Useful life (in years) |  |  | 15 years |  |
Tooling |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Property and equipment, gross | 324 |  | $ 324 |  | 240
Tooling | Minimum |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Useful life (in years) |  |  | 2 years |  |
Tooling | Maximum |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Useful life (in years) |  |  | 5 years |  |
Vehicles |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Property and equipment, gross | 83 |  | $ 83 |  | 47
Useful life (in years) |  |  | 5 years |  |
Furniture and fixtures |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Property and equipment, gross | 86 |  | $ 86 |  | 137
Useful life (in years) |  |  | 5 years |  |
Computer software |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Property and equipment, gross | 1,189 |  | $ 1,189 |  | 1,057
Useful life (in years) |  |  | 3 years |  |
Leasehold improvements |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Property and equipment, gross | 169 |  | $ 169 |  | 169
UV - Robots |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Property and equipment, gross | 105 |  | $ 105 |  | 0
Useful life (in years) |  |  | 5 years |  |
Projects in progress |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Property and equipment, gross | $ 68 |  | $ 68 |  | $ 140

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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- Definition Amount, before accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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- Definition Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977 + Details
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- Definition Amount, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980 + Details
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