Fair Value Measurements - Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Aug. 31, 2023	Feb. 28, 2023
Estimate of Fair Value Measurement \| Significant Other Observable Inputs (Level 2) \| Debt Securities
Assets:
Investment	$ 5,029	$ 5,029
Estimate of Fair Value Measurement \| Significant Other Observable Inputs (Level 2) \| Equity Securities
Assets:
Investment	5,757	5,790
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and cash equivalents	726,428	231,861
Total	728,741	234,207
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Debt Securities
Assets:
Investment	0	0
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Equity Securities
Assets:
Investment	2,313	2,346
Recurring \| Significant Other Observable Inputs (Level 2)
Assets:
Cash and cash equivalents	0	0
Total	0	0
Recurring \| Significant Other Observable Inputs (Level 2) \| Debt Securities
Assets:
Investment	0	0
Recurring \| Significant Other Observable Inputs (Level 2) \| Equity Securities
Assets:
Investment	0	0
Recurring \| Significant Unobservable Inputs (Level 3)
Assets:
Cash and cash equivalents	0	0
Total	8,473	8,473
Recurring \| Significant Unobservable Inputs (Level 3) \| Debt Securities
Assets:
Investment	5,029	5,029
Recurring \| Significant Unobservable Inputs (Level 3) \| Equity Securities
Assets:
Investment	3,444	3,444
Recurring \| Estimate of Fair Value Measurement
Assets:
Cash and cash equivalents	726,428	231,861
Total	737,214	242,680
Recurring \| Estimate of Fair Value Measurement \| Debt Securities
Assets:
Investment	5,029	5,029
Recurring \| Estimate of Fair Value Measurement \| Equity Securities
Assets:
Investment	$ 5,757	$ 5,790

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

No definition available.

+ Details

Name:	us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

+ Details

Name:	us-gaap_InvestmentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_DebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: