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Business Acquisitions - Summary of Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Sep. 10, 2021 | Aug. 02, 2021 | Dec. 31, 2020 | Mar. 02, 2020 | Dec. 31, 2019
--- | --- | --- | --- | --- | --- | ---
Intangible assets subject to amortization |  |  |  |  |  |
Goodwill | $ 162,579 |  |  | $ 118,312 |  | $ 87,356
Trident University International |  |  |  |  |  |
Assets: |  |  |  |  |  |
Student receivables |  |  |  |  | $ 6,212 |
Other current assets |  |  |  |  | 912 |
Property and equipment |  |  |  |  | 3,932 |
Intangible assets subject to amortization |  |  |  |  |  |
Goodwill |  |  |  |  | 30,956 |
Deferred tax asset |  |  |  |  | 454 |
Other non-current assets |  |  |  |  | 270 |
Total assets acquired |  |  |  |  | 53,136 |
Liabilities: |  |  |  |  |  |
Accounts payable and other accrued liabilities |  |  |  |  | 2,622 |
Deferred revenue |  |  |  |  | 4,749 |
Loan discharge reserve |  |  |  |  | 1,900 |
Other long-term liabilities |  |  |  |  | 46 |
Total liabilities assumed |  |  |  |  | 9,317 |
Net assets acquired |  |  |  |  | 43,819 |
DigitalCrafts |  |  |  |  |  |
Assets: |  |  |  |  |  |
Student receivables |  |  | $ 1,777 |  |  |
Other current assets |  |  | 4 |  |  |
Intangible assets subject to amortization |  |  |  |  |  |
Goodwill |  |  | 16,477 |  |  |
Total assets acquired |  |  | 20,028 |  |  |
Liabilities: |  |  |  |  |  |
Accounts payable and other accrued liabilities |  |  | 268 |  |  |
Deferred revenue |  |  | 1,404 |  |  |
Total liabilities assumed |  |  | 1,672 |  |  |
Net assets acquired |  |  | 18,356 |  |  |
Hippo |  |  |  |  |  |
Assets: |  |  |  |  |  |
Cash |  | $ 93 |  |  |  |
Student receivables |  | 202 |  |  |  |
Other current assets |  | 25 |  |  |  |
Property and equipment |  | 27 |  |  |  |
Intangible assets subject to amortization |  |  |  |  |  |
Goodwill |  | 27,790 |  |  |  |
Total assets acquired |  | 47,537 |  |  |  |
Liabilities: |  |  |  |  |  |
Accounts payable and other accrued liabilities |  | 315 |  |  |  |
Deferred revenue |  | 3,952 |  |  |  |
Total liabilities assumed |  | 4,267 |  |  |  |
Net assets acquired |  | 43,270 |  |  |  |
Trade Names | Trident University International |  |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  |  |
Fair value of intangible assets |  |  |  |  | 1,000 |
Trade Names | DigitalCrafts |  |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  |  |
Fair value of intangible assets |  |  | 740 |  |  |
Trade Names | Hippo |  |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  |  |
Fair value of intangible assets |  | 3,340 |  |  |  |
Customer Relationship | Trident University International |  |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  |  |
Fair value of intangible assets |  |  |  |  | 8,000 |
Customer Relationship | DigitalCrafts |  |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  |  |
Fair value of intangible assets |  |  | 200 |  |  |
Customer Relationship | Hippo |  |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  |  |
Fair value of intangible assets |  | 14,100 |  |  |  |
Course Curriculum | Trident University International |  |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  |  |
Fair value of intangible assets |  |  |  |  | $ 1,400 |
Developed Technology Rights | DigitalCrafts |  |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  |  |
Fair value of intangible assets |  |  | $ 830 |  |  |
Developed Technology Rights | Hippo |  |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  |  |
Fair value of intangible assets |  | $ 1,960 |  |  |  |

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