Fair Value Measurements - Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	May 31, 2023	Feb. 28, 2023
Estimate of Fair Value Measurement \| Significant Other Observable Inputs (Level 2) \| Debt Securities
Assets:
Investments, Fair Value Disclosure	$ 5,029	$ 5,029
Estimate of Fair Value Measurement \| Significant Other Observable Inputs (Level 2) \| Equity Securities
Assets:
Investments, Fair Value Disclosure	5,513	5,790
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Cash and cash equivalents	136,156	231,861
Total	138,225	234,207
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Debt Securities
Assets:
Investments, Fair Value Disclosure	0	0
Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Equity Securities
Assets:
Investments, Fair Value Disclosure	2,069	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:
Investments, Fair Value Disclosure	0	0
Recurring \| Significant Other Observable Inputs (Level 2) \| Equity Securities
Assets:
Investments, Fair Value Disclosure	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:
Investments, Fair Value Disclosure	5,029	5,029
Recurring \| Significant Unobservable Inputs (Level 3) \| Equity Securities
Assets:
Investments, Fair Value Disclosure	3,444	3,444
Recurring \| Estimate of Fair Value Measurement
Assets:
Cash and cash equivalents	136,156	231,861
Total	146,698	242,680
Recurring \| Estimate of Fair Value Measurement \| Debt Securities
Assets:
Investments, Fair Value Disclosure	5,029	5,029
Recurring \| Estimate of Fair Value Measurement \| Equity Securities
Assets:
Investments, Fair Value Disclosure	$ 5,513	$ 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

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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.

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- 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

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