Note 2 - Derivative Instruments and Hedging Activities (Details) - Outstanding Foreign Currency Contracts (Foreign Exchange Contract [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
United States of America, Dollars
Note 2 - Derivative Instruments and Hedging Activities (Details) - Outstanding Foreign Currency Contracts [Line Items]
Foreign currency contracts, notional amount	$ 250	$ 650
United Kingdom, Pounds
Note 2 - Derivative Instruments and Hedging Activities (Details) - Outstanding Foreign Currency Contracts [Line Items]
Foreign currency contracts, notional amount	$ 3,000	$ 4,000

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant