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Segment and Geographic Information - Percentage of sales (Details) - Net sales revenue - Customer concentration risk	12 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016
Largest customer
Foreign Currency Risk and Currency Exchange Uncertainties
Percentage of net sales revenue	15.00%	16.00%	18.00%
Largest customer | United States
Foreign Currency Risk and Currency Exchange Uncertainties
Percentage of sales from largest customer that were within the U.S.	78.00%	79.00%	78.00%
Second largest customer | United States
Foreign Currency Risk and Currency Exchange Uncertainties
Percentage of sales from largest customer that were within the U.S.	13.00%

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- Definition

Percentage of revenues from customer that are generated within the United States.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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-Section 50
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