Note 8 Goodwill and Intangible Assets (Finite-Lived Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	$ 38,087	$ 38,087
Accumulated Amortization	23,447	21,740
Net Intangible Assets	14,640	16,347
Developed Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	16,304	16,304
Accumulated Amortization	5,759	4,984
Net Intangible Assets	10,545	11,320
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	13,020	13,020
Accumulated Amortization	9,560	8,695
Net Intangible Assets	3,460	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	973	906
Net Intangible Assets	$ 635	$ 702