Note 11 - Commitments (Details Textual) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
|Purchase Obligation, Due in Next Twelve Months||$ 25,657||$ 14,394|
Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.
No definition available.