Note 2 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Details) $ in Thousands	Mar. 31, 2017 USD ($)
Financial liabilities	$ (479)
Foreign Exchange Forward [Member]
Financial assets
Financial liabilities	(479)
Fair Value, Inputs, Level 1 [Member]
Financial assets	1,645
Fair Value, Inputs, Level 1 [Member] | Foreign Exchange Forward [Member]
Financial assets	1,645
Financial liabilities
Fair Value, Inputs, Level 2 [Member]
Financial assets	1,645
Fair Value, Inputs, Level 2 [Member] | Foreign Exchange Forward [Member]
Financial assets	1,645
Financial liabilities
Fair Value, Inputs, Level 3 [Member]
Financial liabilities	(479)
Fair Value, Inputs, Level 3 [Member] | Foreign Exchange Forward [Member]
Financial assets
Financial liabilities	$ (479)