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Equipment and Improvements | 12 Months Ended
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Dec. 31, 2021
Property Plant And Equipment [Abstract] |
Equipment and Improvements | 3. Equipment and Improvements Equipment and improvements consist of the following (in thousands):
|  | December 31, |
|  | 2021 |  |  | 2020 |
Computer hardware, software, and equipment |  | $ | 10,531 |  |  | $ | 9,814 |
Leasehold improvements |  |  | 3,378 |  |  |  | 2,959 |
Office furniture and fixtures |  |  | 803 |  |  |  | 714 |
Construction in progress |  |  | 13 |  |  |  | 24 |
|  |  | 14,725 |  |  |  | 13,511 |
Less accumulated depreciation and amortization |  |  | (12,027 | ) |  |  | (11,341 | )
Equipment and improvements, net |  | $ | 2,698 |  |  | $ | 2,170 |
Depreciation and amortization expense on equipment and improvements was $1.2 million and $0.7 million 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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