Commitments and Contingencies (Details 2) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended			0 Months Ended
	Mar. 31, 2014	Jun. 30, 2014 item	Jan. 31, 2014 Office space in Bedford, Massachusetts item	Jun. 30, 2014 Office space in Bedford, Massachusetts	Jan. 31, 2014 Office space in Bedford, Massachusetts Minimum	Jan. 31, 2014 Office space in Bedford, Massachusetts Maximum	Jan. 31, 2014 Office space in Bedford, Massachusetts Lease term commencing on November 1, 2014 sqft	Jan. 31, 2014 Office space in Bedford, Massachusetts Lease term commencing on February 1, 2015 sqft
Legal Matters
Amount of damages sought	$ 2.6
Matters that might have a material adverse effect on financial position, results of operations or cash flows		0
Operating leases
Area of office space (in square feet)							105,874	36,799
Initial term of lease							10 years 5 months
Number of successive five-year terms for which the lease may be extended			2
Extension period of lease term			5 years
Base annual rent expense					2.2	3.9
Contractual obligations related to the new facility capital expenditures are expected to be made in fiscal 2015		2.0
Aggregate capital expenditures with respect to the leased premises				8.9
Future minimum non-cancelable lease payments		35.8
Standby letters of credit		$ 2.2