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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Current assets    
Cash and cash equivalents $ 69,349 $ 854,078
Short-term investments 871,408 691,781
Accounts receivable, net of allowance of $298 and $153 at September 30, 2022 and December 31, 2021, respectively 22,187 17,850
Prepaid expenses 33,441 35,093
Other current assets 35,196 23,846
Total current assets 1,031,581 1,622,648
Long-term investments 286,781 745,993
Textbook library, net 0 11,241
Property and equipment, net 202,362 169,938
Goodwill 589,702 289,763
Intangible assets, net 80,646 40,566
Right of use assets 18,144 18,062
Deferred tax assets 166,965 1,365
Other assets 21,680 19,670
Total assets 2,397,861 2,919,246
Current liabilities    
Accounts payable 14,902 11,992
Deferred revenue 60,475 35,143
Accrued liabilities 68,096 67,209
Total current liabilities 143,473 114,344
Long-term liabilities    
Convertible senior notes, net 1,187,513 1,678,155
Long-term operating lease liabilities 12,347 12,447
Other long-term liabilities 7,996 7,383
Total long-term liabilities 1,207,856 1,697,985
Total liabilities 1,351,329 1,812,329
Commitments and contingencies (Note 9)
Stockholders' equity:    
Preferred stock, $0.001 par value per share, 10,000,000 shares authorized, no shares issued and outstanding 0 0
Common stock, $0.001 par value per share: 400,000,000 shares authorized; 125,423,860 and 136,951,956 shares issued and outstanding at September 30, 2022 and December 31, 2021, respectively 125 137
Additional paid-in capital 1,220,688 1,449,305
Accumulated other comprehensive loss (101,870) (5,334)
Accumulated deficit (72,411) (337,191)
Total stockholders' equity 1,046,532 1,106,917
Total liabilities and stockholders' equity $ 2,397,861 $ 2,919,246