Note 9 - Commitments and Contingencies (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Lease Agreement Term		5 years
Purchase Commitment, Remaining Minimum Amount Committed	$ 5.0	$ 5.0
Long-term Purchase Commitment, Amount		0.2
Purchase Option Description		$1.8
Operating Leases, Rent Expense		$ 1.6	$ 2.1	$ 1.8
Standard Product Warranty Description	12	one