Note 12 - Commitments and Contingencies (Details) (Campbell Facility [Member])	3 Months Ended
Mar. 31, 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
Lease Expiration Date	Oct. 31, 2018

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