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Equipment and Leasehold Improvements | 12 Months Ended
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Dec. 31, 2020
Property, Plant and Equipment [Abstract] |
Equipment and Leasehold Improvements |
| (7) | Equipment and Leasehold Improvements
|  | December 31, |
|  | 2020 |  |  | 2019 |
Equipment |  | $ | 51,060 |  |  | $ | 37,743 |
Leasehold improvements |  |  | 1,989 |  |  |  | 1,760 |
|  |  | 53,049 |  |  |  | 39,503 |
Less accumulated depreciation and amortization |  |  | 33,469 |  |  |  | 28,396 |
|  | $ | 19,580 |  |  | $ | 11,107 |
Depreciation and amortization expense was $3.8 million, $3.7 million and $4.1 million in 2020, 2019, and 2018, 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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