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Property and Equipment, Net | 12 Months Ended
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Dec. 31, 2021
Property, Plant and Equipment [Abstract] |
Property and Equipment, Net | 5. Property and Equipment, Net Property and equipment, net, consists of the following at December 31:
($ in thousands) |  | 2021 |  |  | 2020 |
Equipment installed at customer sites |  | $ | 112,770 |  |  | $ | 79,039 |
Software |  |  | 24,207 |  |  |  | 19,202 |
Leasehold improvements |  |  | 9,255 |  |  |  | 9,938 |
Computer equipment |  |  | 14,215 |  |  |  | 10,974 |
Furniture |  |  | 2,662 |  |  |  | 2,079 |
Automobiles |  |  | 4,761 |  |  |  | 2,899 |
Construction in progress |  |  | 12,169 |  |  |  | 6,717 |
Property and equipment |  |  | 180,039 |  |  |  | 130,848 |
Less: accumulated depreciation |  |  | (83,973 | ) |  |  | (60,564 | )
Property and equipment, net |  | $ | 96,066 |  |  | $ | 70,284 |
Depreciation expense was $26.8 million, $23.1 million and $22.8 million for the fiscal years ended December 31, 2021, 2020 and 2019, respectively, including depreciation related to costs to develop or implement software for internal use of $4.4 million, $4.3 million and $3.8 million for the fiscal years ended December 31, 2021, 2020 and 2019, 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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