Income Taxes Operating Loss Carryforwards (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 27.6	$ 5.3
Operating loss carryforwards, valuation allowance	27.6	5.3
Expected future benefit from operating loss carryforwards that will be recorded in the Consolidated Statement of Operations	21.3
Federal | Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax research credit carryforwards	1.8	1.4
Expected future benefit from tax research credit carryforwards that will be recorded in the Consolidated Statement of Operations	1.1	0.6
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	97.5	30.6
Operating loss carryforwards, valuation allowance	97.5	30.6
Expected future benefit from operating loss carryforwards that will be recorded in the Consolidated Statement of Operations	1.5
State | Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax research credit carryforwards	0.6	0.5
Expected future benefit from tax research credit carryforwards that will be recorded in the Consolidated Statement of Operations	0.5	0.3
State | State of Oregon
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	31.2
State | Multnomah County, Oregon
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	30.4
State | Portland, Oregon
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	30.4
State | Outside of Oregon State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	5.5
Foreign
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0.7	2.1
Operating loss carryforwards, valuation allowance	$ 0.7	$ 2.0