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Note 3 - Balance Sheet Components (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Disclosure Text Block Supplement [Abstract]      
Unbilled Receivables, Current $ 9.2us-gaap_UnbilledReceivablesCurrent   $ 9.7us-gaap_UnbilledReceivablesCurrent
Depreciation, Depletion and Amortization, Nonproduction $ 0.6us-gaap_DepreciationAndAmortization $ 0.5us-gaap_DepreciationAndAmortization