Equity Investments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2014	Nov. 30, 2013	Feb. 28, 2014
Equity Method Investment, Ownership Percentage	20.00%		20.00%
Equity in income of equity investees	$ 1,245	$ 1,520	$ 4,631	$ 4,772
Equity Method Investment, Summarized Financial Information, Current Assets	45,441		45,441		41,820
Equity Method Investment, Summarized Financial Information, Noncurrent Assets	5,338		5,338		5,171
Equity Method Investment, Summarized Financial Information, Current Liabilities	8,085		8,085		5,735
Equity Method Investment Summarized Financial Information, Equity	42,694		42,694		41,256
Equity Method Investment, Summarized Financial Information, Revenue			71,974	71,504
Equity Method Investment, Summarized Financial Information, Gross Profit (Loss)			21,187	21,942
Equity Method Investment, Summarized Financial Information, Operating Income (Loss)			8,834	9,503
Equity Method Investment, Summarized Financial Information, Net Income (Loss)			$ 9,262	$ 9,544
ASA Electronics, LLC [Member]
Equity Method Investment, Ownership Percentage	50.00%		50.00%		50.00%

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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The amount of current assets reported by an equity method investment of the entity.

+ References

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The amount of current liabilities reported by an equity method investment of the entity.

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Amount of equity, including noncontrolling interest, reported by an equity method investment of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The amount of gross profit (loss) reported by an equity method investment of the entity.

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The amount of net income (loss) reported by an equity method investment of the entity.

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The amount of noncurrent assets reported by an equity method investment of the entity.

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- Definition

The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity.

+ References

No definition available.

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The amount of operating income (loss) reported by an equity method investment of the entity.

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No definition available.

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