Note 10 - Fair Value Measurement (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Jul. 30, 2014	Jul. 22, 2014
Note 10 - Fair Value Measurement (Details) [Line Items]
Business Combination, Contingent Consideration, Liability	$ 2,507,000	$ 2,507,000
Sensima [Member]
Note 10 - Fair Value Measurement (Details) [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High			8,900,000	8,900,000
Business Combination, Contingent Consideration, Liability	$ 2,507,000		$ 2,500,000	$ 2,500,000