Equity Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2016	Nov. 30, 2015	Feb. 29, 2016
Equity Method Investment, Ownership Percentage	20.00%		20.00%
Equity in income of equity investees	$ 1,931	$ 1,927	$ 5,284	$ 5,002
Equity Method Investment, Summarized Financial Information, Current Assets	45,839		45,839		$ 44,097
Equity Method Investment, Summarized Financial Information, Noncurrent Assets	5,782		5,782		5,658
Equity Method Investment, Summarized Financial Information, Current Liabilities	6,935		6,935		5,857
Equity Method Investment Summarized Financial Information, Equity	$ 44,686		44,686		$ 43,898
Equity Method Investment, Summarized Financial Information, Revenue			70,982	69,967
Equity Method Investment, Summarized Financial Information, Gross Profit (Loss)			22,936	21,633
Equity Method Investment, Summarized Financial Information, Income (Loss) from Continuing Operations before Extraordinary Items			10,527	9,983
Equity Method Investment, Summarized Financial Information, Net Income (Loss)			$ 10,567	$ 10,004
ASA Electronics, LLC [Member]
Equity Method Investment, Ownership Percentage	50.00%		50.00%		50.00%