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Required Materials Transition	12 Months Ended
Required Materials Transition	Dec. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
Required Materials Transition	Required Materials Transition In April 2022, we entered into definitive agreements regarding the sale of our print textbook library and partnership with GT Marketplace, LLC (GT) for our print textbook and eTextbook offerings, previously presented as our Required Materials product line. We will continue to offer these products services on our website and maintain relationships with the students, however, GT has purchased our existing print textbook library for $14 million, subject to payment terms and certain adjustments, and will continue to make print textbook investments and provide fulfillment logistics for print textbook transactions. Beginning December 2022, GT also began fulfilling eTextbook transactions. Upon board of directors approval of the transaction with GT in April 2022, our net textbook library and unrecognized deferred revenue related to print textbook transactions met the criteria to be classified as a held for sale asset group which had a carrying amount of $7.7 million. During the year ended December 31, 2022, we subsequently sold the held for sale asset group to GT at a gain of $4.4 million, subject to certain adjustments, included in cost of revenues on our consolidated statement of operations. As of December 31, 2022, we had no amounts related to textbook library, net recorded on our consolidated balance sheets. Beginning in April 2022, we no longer recognize operating lease income from print textbooks that we own ratable on a gross basis. Beginning in December 2022, we no longer recognize revenues from eTextbooks ratable over the customer's contractual period. In relation to print textbooks owned by GT and eTextbooks fulfilled by GT, we recognize revenues immediately on a net basis, representing the margin earned, based on our role in the transaction as an agent as we have concluded that we do not control the use of the print textbooks, and therefore record only the net revenue share we earn. During the years ended December 31, 2022, 2021, and 2020, print textbook depreciation expense was $1.6 million, $10.9 million and $15.4 million, respectively. During the years ended December 31, 2022 and 2020, net gain on textbook library was $5.0 million and $1.5 million, respectively, and during the year ended December 31, 2021, net loss on textbook library was $11.0 million.