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Investment in NEC TOKIN (Details 2) (NEC TOKIN, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
NEC TOKIN
Summarized financial information
Current assets	$ 245,709	$ 220,652
Noncurrent assets	302,161	422,246
Current liabilities	120,929	121,238
Noncurrent liabilities	360,908	411,789
Net sales	512,073	82,772
Gross profit	90,325	9,147
Net loss	$ (42,937)	$ (2,216)

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

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

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

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

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

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