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Segment and Geographic Information - Percentage of sales (Details)	12 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015
Foreign Currency Risk and Currency Exchange Uncertainties
Percentage of net sales revenue	44.00%	44.00%
Net sales revenue | Customer concentration risk | Largest customer
Foreign Currency Risk and Currency Exchange Uncertainties
Percentage of net sales revenue	15.00%	16.00%	18.00%
Net sales revenue | Customer concentration risk | Largest customer | United States
Foreign Currency Risk and Currency Exchange Uncertainties
Percentage of sales from largest customer that were within the U.S.	94.00%	94.00%	84.00%

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- Definition

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

+ References

No definition available.

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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

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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
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