Note 8 - Business Combination (Details) - Components and Estimated Useful Lives of Acquired Intangible Assets (Zxy Sport Tracking AS [Member], USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2014
Definite-lived intangibles:
Finite-lived intangible assets	$ 2,600
Patented Technology [Member]
Definite-lived intangibles:
Finite-lived intangible assets	2,300
Estimated useful life	15 years
Trade Names [Member]
Definite-lived intangibles:
Finite-lived intangible assets	$ 300
Estimated useful life	15 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

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