Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Mar. 31, 2016
Current assets:
Cash and cash equivalents	$ 74,753	$ 65,004
Accounts receivable, net	88,089	93,168
Inventories, net	164,977	168,879
Prepaid expenses and other	30,990	25,496
Total current assets	358,809	352,547
Noncurrent Assets:
Property, plant and equipment, net of accumulated depreciation of $824,241 and $815,338 as of September 30, 2016 and March 31, 2016, respectively	221,490	241,839
Goodwill	40,294	40,294
Intangible assets, net	30,993	33,301
Investment in NEC TOKIN	15,174	20,334
Deferred income taxes	7,749	8,397
Other assets	2,466	3,068
Total assets	676,975	699,780
Current liabilities:
Current portion of long-term debt	0	2,000
Accounts payable	64,055	70,981
Accrued expenses	58,015	50,320
Income taxes payable	293	453
Total current liabilities	122,363	123,754
Liabilities, Noncurrent [Abstract]
Long-term debt, less current portion	386,098	385,833
Other non-current obligations	82,640	74,892
Deferred income taxes	2,994	2,820
Stockholders’ equity:
Preferred stock, par value $0.01, authorized 10,000 shares, none issued	0	0
Common stock, par value $0.01, authorized 175,000 shares, issued 46,508 shares at September 30, 2016 and March 31, 2016	465	465
Additional paid-in capital	445,662	452,821
Retained deficit	(316,843)	(299,510)
Accumulated other comprehensive income	(45,527)	(31,425)
Treasury stock, at cost (226 and 611 shares at September 30, 2016 and March 31, 2016, respectively)	(877)	(9,870)
Total stockholders’ equity	82,880	112,481
Total liabilities and stockholders’ equity	$ 676,975	$ 699,780