Note 11 - Derivative Instrument (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2014 Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] USD ($)	Jun. 30, 2014 Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] DKK	Dec. 31, 2013 Designated as Hedging Instrument [Member] Foreign Exchange Contract [Member] USD ($)
Note 11 - Derivative Instrument (Details) [Line Items]
Number of Foreign Currency Derivatives Held	1	1
Derivative Asset, Notional Amount			$ 1,100,000	6,100,000
Derivative Asset, Fair Value, Gross Asset			90,000		183,100
Change in Unrealized Gain (Loss) on Foreign Currency Fair Value Hedging Instruments	$ (89,000)	$ (93,000)