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Long-Lived Assets (Tables)
12 Months Ended
Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Property, plant and equipment
Property and equipment, net consisted of the following (in thousands):
December 31,
20202019
Content$181,938 $122,670 
Leasehold improvements19,574 17,738 
Internal-use software and website development15,646 7,552 
Furniture and fixtures3,891 3,640 
Computer and equipment3,368 3,355 
Property and equipment224,417 154,955 
Less accumulated depreciation and amortization(98,610)(67,596)
Property and equipment, net$125,807 $87,359 
Schedule Of Long Lived Assets
Textbook library, net consisted of the following (in thousands):

December 31, 2020
Textbook library$47,293 
Less accumulated depreciation(13,144)
Textbook library, net$34,149