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Property and Equipment | 3 Months Ended
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Mar. 31, 2023
Property, Plant and Equipment [Abstract] |
Property and Equipment | PROPERTY AND EQUIPMENT Property and equipment are stated at cost and depreciated using the straight-line method over the estimated useful lives of the related assets and consist of the following (in thousands):
| March 31, 2023 |  | December 31, 2022
Equipment (useful life 3 to 15 years) | $ | 1,061 |  |  | $ | 1,061 |
Tooling (useful life 2 to 5 years) | 190 |  |  | 190 |
Leasehold improvements (the shorter of useful life or lease life) | 141 |  |  | 141 |
Property and equipment at cost | 1,392 |  |  | 1,392 |
Less: accumulated depreciation | (1,324) |  |  | (1,316) |
Property and equipment, net | $ | 68 |  |  | $ | 76 |
Depreciation expense was $8 thousand and $44 thousand for the three months ended March 31, 2023 and 2022, respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI https://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126982197&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99779-112916 + Details
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