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v3.20.2

Background and Basis of Presentation (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Textbook library, net | $ 34,575 | $ 34,575 |  | $ 0
Print textbook depreciation expense |  | 10,699 | $ 0 |
Gain on textbook library, net |  | $ (2,028) | $ 0 |
Textbook Library |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Estimated useful life |  | 4 years |  |
Textbook library, net | 34,600 | $ 34,600 |  |
Property, plant and equipment, gross | 44,800 | 44,800 |  |
Accumulated depreciation | (9,200) | (9,200) |  |
Write down |  | (1,000) |  |
Print textbook depreciation expense | 3,600 | 10,700 |  |
Gain on textbook library, net | $ (600) | $ (2,000) |  |
Textbook Library | Minimum |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Contractual period |  | 2 months |  |
Textbook Library | Maximum |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Contractual period |  | 5 months |  |
eTextbooks | Minimum |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Contractual period |  | 2 months |  |
eTextbooks | Maximum |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Contractual period |  | 5 months |  |

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