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Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 01, 2018 USD ($) | Jun. 30, 2022 USD ($) | Dec. 31, 2021 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2022 USD ($) segment | Jun. 30, 2021 USD ($) | Dec. 31, 2019 USD ($) | Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Mar. 31, 2020 USD ($)
Summary Of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |
Investments |  | $ 63,867 | $ 0 |  | $ 63,867 |  |  |  |  |  |
Other assets |  | 1,842 | 1,943 |  | $ 1,842 |  |  |  |  |  |
Number of operating segments | segment |  |  |  |  | 1 |  |  |  |  |  |
Number of reporting units | segment |  |  |  |  | 1 |  |  |  |  |  |
Unbilled revenue |  | 7,912 | 3,841 |  | $ 7,912 |  |  |  |  |  |
Amounts written off |  |  |  |  | 0 |  |  |  |  |  |
Allowance for doubtful accounts |  | 0 |  |  | 0 |  |  |  |  |  |
Allowance for credit losses |  |  |  | $ 5,000 |  | $ 5,000 |  |  |  |  |
Stockholders equity |  | 606,638 | 1,045,047 | 1,542,683 | 606,638 | 1,542,683 |  | $ 706,437 | $ 1,588,678 | $ 1,574,329 |
Income tax expense |  | 8,622 |  | $ 15,035 | 28,214 | $ 35,020 |  |  |  |  |
Reversal of credit loss reserve |  |  | 5,000 |  |  |  |  |  |  |  |
Cash in excess of FDIC insured limits |  | 138,519 | 600,130 |  | $ 138,519 |  |  |  |  |  |
Revenue Benchmark | Customer Concentration Risk | Grand Canyon University |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  | 85.10% | 85.70% |  |  |  |  |
Computer Software |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |
Estimated average useful life |  |  |  |  | 3 years |  |  |  |  |  |
Capitalized Content Development |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |
Estimated average useful life |  |  |  |  | 4 years |  |  |  |  |  |
Other assets |  | $ 1,020 | $ 1,168 |  | $ 1,020 |  |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |
Initial contract terms of service agreements |  |  |  |  | 7 years |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |
Initial contract terms of service agreements |  |  |  |  | 15 years |  |  |  |  |  |
Grand Canyon University |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |
Purchase price of assets | $ 870,097 |  |  |  |  |  |  |  |  |  |
Master Services Agreement | Grand Canyon University |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |
Percentage of tuition and fee revenue used for closing of purchase agreement | 60.00% |  |  |  |  |  |  |  |  |  |
Cumulative Effect of Adoption Adjustment | ASU 2016-13 |  |  |  |  |  |  |  |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |  |  |  |  |  |  |  |
Allowance for credit losses |  |  |  |  |  |  |  |  |  | $ 5,000 | $ 5,000
Stockholders equity |  |  |  |  |  |  | $ (3,832) |  |  |  |
Income tax expense |  |  |  |  |  |  | $ 1,168 |  |  |  |

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