Note 8 Goodwill and Intangible Assets (Finite-Lived Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Mar. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	$ 38,087	$ 38,087
Accumulated Amortization	24,866	21,740
Net Intangible Assets	13,221	16,347
Developed Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	16,304	16,304
Accumulated Amortization	6,534	4,984
Net Intangible Assets	9,770	11,320
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	13,020	13,020
Accumulated Amortization	10,137	8,695
Net Intangible Assets	2,883	4,325
Contract Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	7,155	7,155
Accumulated Amortization	7,155	7,155
Net Intangible Assets	0	0
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	1,608	1,608
Accumulated Amortization	1,040	906
Net Intangible Assets	$ 568	$ 702