Note 4 - Goodwill and Acquisition-related Intangible Assets, Net (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Cost Of Revenue [Member]
Amortization of Intangible Assets	$ 500,000	$ 400,000	$ 1,000,000	$ 700,000
Goodwill, Period Increase (Decrease)	$ 0		$ 0