Note 11 - Revenue and Geographic Information - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| UNITED STATES | ||
| Long-lived assets: | ||
| Long-lived assets | $ 109,230 | $ 98,633 |
| International [Member] | ||
| Long-lived assets: | ||
| Long-lived assets | 33,492 | 26,842 |
| Long-lived assets | $ 142,722 | $ 125,475 |