Sale of TPack A/S (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		0 Months Ended	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Apr. 22, 2013 TPack [Member]	Sep. 30, 2013 TPack [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Adjusted sale price of entity					$ 33,500
Agreed upon price for sale of entity					34,000
Working capital adjustment to sale price					500
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]
Total proceeds, net of working capital adjustment					30,175
Net assets and liabilities					(184)
Goodwill write off					(1,757)
Intangibles write off					(11,404)	11,400
Holdback amount					3,353
Legal fees and other costs					(484)
Gain on sale of TPack	0	0	19,699	0	19,699
Cash, cash equivalents and short term investments					$ 700