Accrued Restructuring Expense - Additional Information (Details) - USD ($)	3 Months Ended	9 Months Ended
Nov. 30, 2020	Nov. 30, 2020	Feb. 29, 2020
Restructuring And Related Activities [Abstract]
Restructuring liability, included accrued expenses and other current liabilities	$ 105,000	$ 105,000	$ 637,000
Additional accruals settled	63,000	532,000
Restructuring expenses	$ 0	$ 0

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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