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Equipment and Leasehold Improvements | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment [Abstract] |
Equipment and Leasehold Improvements |
(5) | Equipment and Leasehold Improvements
Equipment and leasehold improvements consist of the following:
|  | As of December 31, |
|  | 2021 |  |  | 2020 |
Machinery and equipment |  | $ | 18,289 |  |  | $ | 16,758 |
Office equipment |  |  | 961 |  |  |  | 870 |
Office furniture |  |  | 110 |  |  |  | 110 |
Leasehold improvements |  |  | 4,900 |  |  |  | 4,850 |
Construction in progress |  |  | 1,062 |  |  |  | 445 |
|  |  | 25,322 |  |  |  | 23,033 |
Less: Accumulated depreciation and amortization |  |  | (20,610 | ) |  |  | (20,165 | )
|  | $ | 4,712 |  |  | $ | 2,868 |
Depreciation expense was $444 and $348, for the years ended December 31, 2021 and 2020, 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 http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://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 http://asc.fasb.org/extlink&oid=120429125&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 http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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