Product Warranties and Product Repair Costs - Schedule of Product Warranty Liability (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2019	Aug. 31, 2018
Payables And Accruals Warranties [Abstract]
Opening balance	$ 4,151	$ 4,925	$ 4,469	$ 6,233
Liabilities for warranties accrued during the period	1,147	1,366	2,434	2,866
Balances transferred	0	0	0	(832)
Warranties paid during the period	(1,236)	(1,436)	(2,841)	(3,412)
Ending balance	$ 4,062	$ 4,855	$ 4,062	$ 4,855

Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (c)(1),(c)(5)
-URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of decrease in the standard product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard product warranty. Excludes extended product warranties.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph ((c)(2))
-URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249

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- Definition

Amount of increase in the standard product warranty accrual from warranties issued. Excludes extended product warranties.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph ((c)(3))
-URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249

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- Definition

Payables and Accruals - Warranties [Abstract]

+ References

No definition available.

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- Definition

Standard product warranty accrual balance transferred.

+ References

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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