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Research and Development Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2023	Aug. 31, 2022
Research and Development Expenses	$ 2,038	$ 3,751	$ 6,528	$ 10,552
Research and Development Expenses	(2,038)	(3,751)	(6,528)	(10,552)
Employee Compensation R & D [Member]
Research and Development Expenses	1,373	2,068	2,819	4,355
Research and Development Expenses	(1,373)	(2,068)	(2,819)	(4,355)
Machinery and Equipments [Member]
Research and Development Expenses	0	1,184	1,236	3,073
Research and Development Expenses	0	(1,184)	(1,236)	(3,073)
External Engineering [Member]
Research and Development Expenses	141	611	1,297	2,206
Research and Development Expenses	(141)	(611)	(1,297)	(2,206)
Plant and Laboratory Operating Expenses [Member]
Research and Development Expenses	447	584	916	1,450
Research and Development Expenses	(447)	(584)	(916)	(1,450)
Other [Member]
Research and Development Expenses	99	143	307	376
Research and Development Expenses	(99)	(143)	(307)	(376)
Tax Credits [Member]
Research and Development Expenses	22	839	47	908
Research and Development Expenses	$ (22)	$ (839)	$ (47)	$ (908)

X

- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 730
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482916/730-10-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 912
-SubTopic 730
-Name Accounting Standards Codification
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482517/912-730-25-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481283/985-20-50-1

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