Note 5 - Business Disposition and Wind Down (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended					9 Months Ended	12 Months Ended	9 Months Ended
	Jun. 30, 2010 DPS Business [Member] Proceeds Received Upon Closing [Member]	Jun. 30, 2010 DPS Business [Member] Proceeds Withheld in Escrow [Member]	Jun. 30, 2011 DPS Business [Member] Proceeds Remaining in Escrow to Provide for One Disputed Claim [Member]	Sep. 30, 2011 DPS Business [Member] Release of Remaining Proceeds in Escrow [Member]	Jun. 30, 2010 DPS Business [Member]	Dec. 31, 2010 DPS Business [Member]	Dec. 31, 2011 Patents From DPS Business [Member]	Dec. 31, 2010 Incurred and Reimbursed Under the Transition Service Agreement with PMC-Sierra [Member]	Dec. 31, 2010 Restricted Cash Received on Behalf of PMC-Sierra Upon Collection of Accounts Receivable [Member]
Proceeds from Divestiture of Businesses	$ 29.3	$ 5.0	$ 0.1	$ 0.1	$ 34.3
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax						10.7
Discontinued Operation, Tax Effect of Income (Loss) from Disposal of Discontinued Operation						6.6
Accounts Payable									1.7
Cost of Services								1.3
Proceeds from Sale of Intangible Assets							$ 1.9