Note 10 - Derivatives and Hedging Activities - Fair Value of Outstanding Derivative Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Derivative Assets	$ 0	$ 56
Derivatives Designated as Cash Flow Hedging Instruments [Member] \| Foreign Exchange Option Contracts [Member]
Derivative Assets	0	14
Derivatives Designated as Cash Flow Hedging Instruments [Member] \| Foreign Exchange Forward Contracts [Member]
Derivative Assets	$ 0	$ 42

Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps.

No definition available.

Name:	us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant