Note 14 - Information About Geographic Areas (Details) - Revenues by Geographic Area (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Note 14 - Information About Geographic Areas (Details) - Revenues by Geographic Area [Line Items]
Revenues	$ 23,153		$ 18,266		$ 64,220		$ 50,122
UNITED STATES
Note 14 - Information About Geographic Areas (Details) - Revenues by Geographic Area [Line Items]
Revenues	19,694		15,890		55,598		43,120
International [Member]
Note 14 - Information About Geographic Areas (Details) - Revenues by Geographic Area [Line Items]
Revenues	$ 3,459	[1]	$ 2,376	[1]	$ 8,622	[1]	$ 7,002	[1]

[1] No foreign country accounted for more than 10% of total revenue.