Note 12 - Commitments and Contingencies (Details) (Campbell Facility [Member])	6 Months Ended
Jun. 30, 2014 sqft
Campbell Facility [Member]
Note 12 - Commitments and Contingencies (Details) [Line Items]
Area of Real Estate Property	10,659
Lessee Leasing Arrangements, Operating Leases, Term of Contract	5 years

Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration