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Long-Lived Assets | 12 Months Ended
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Dec. 31, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Long-Lived Assets | Long-Lived Assets Textbook Library, Net Textbook library, net consisted of the following (in thousands):
| December 31,
| 2021 |  | 2020
Textbook library | $ | 27,569 |  |  | $ | 47,293 |
Less accumulated depreciation | (16,328) |  |  | (13,144) |
Textbook library, net | $ | 11,241 |  |  | $ | 34,149 |
During the years ended December 31, 2021 and December 31, 2020, print textbook depreciation expense was approximately $10.9 million and $15.4 million, respectively. During the year ended December 31, 2021, net loss on textbook library was approximately $11.0 million, primarily due to increased write-downs, and during the year ended December 31, 2020, net gain on textbook library was approximately $1.5 million. Property and Equipment, Net Property and equipment, net consisted of the following (in thousands):
| December 31,
| 2021 |  | 2020
Content | $ | 258,005 |  |  | $ | 181,938 |
Internal-use software and website development | 29,711 |  |  | 15,646 |
Leasehold improvements | 19,913 |  |  | 19,574 |
Furniture and fixtures | 4,352 |  |  | 3,891 |
Computer and equipment | 3,370 |  |  | 3,368 |
Property and equipment | 315,351 |  |  | 224,417 |
Less accumulated depreciation and amortization | (145,413) |  |  | (98,610) |
Property and equipment, net | $ | 169,938 |  |  | $ | 125,807 |
Depreciation and content amortization expense during the years ended December 31, 2021, 2020, and 2019 were approximately $49.6 million, $32.6 million, and $24.2 million, respectively.

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