Note 8 - Business Combination (Details) - Components and Estimated Useful Lives of Acquired Intangible Assets (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Patented Technology [Member] | Zxy Sport Tracking AS [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	$ 2,300
Estimated useful life	15 years
Patented Technology [Member] | WeatherOne Transaction [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	400
Estimated useful life	15 years
Trade Names [Member] | Zxy Sport Tracking AS [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	300
Estimated useful life	15 years
Trade Names [Member] | WeatherOne Transaction [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	100
Estimated useful life	15 years
Supplier Relationships [Member] | WeatherOne Transaction [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	400
Estimated useful life	15 years
Zxy Sport Tracking AS [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	2,600
WeatherOne Transaction [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	$ 900