Note 11 - Derivatives and Hedging Activities - Fair Value of Outstanding Derivative Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Foreign exchange contracts	$ 56
Derivative Liabilities		77
Derivatives Designated as Cash Flow Hedging Instruments [Member] \| Foreign Exchange Option Contracts [Member]
Foreign exchange contracts	2
Derivative Liabilities		14
Derivatives Designated as Cash Flow Hedging Instruments [Member] \| Foreign Exchange Forward Contracts [Member]
Foreign exchange contracts	54
Derivative Liabilities		$ 63

Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into.

No definition available.

Name:	us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant