Note 7 - Derivative Instruments (Details) - USD ($)	3 Months Ended
Mar. 31, 2016	Dec. 31, 2015
Note 7 - Derivative Instruments (Details) [Line Items]
Derivative Asset	$ 185,000
Derivative Liability	23,000
Derivative Assets (Liabilities), at Fair Value, Net	162,000	$ (36,000)
Foreign Exchange Option [Member]
Note 7 - Derivative Instruments (Details) [Line Items]
Price Risk Cash Flow Hedge Asset, at Fair Value	9,550,000
Foreign Exchange Contract [Member]
Note 7 - Derivative Instruments (Details) [Line Items]
Price Risk Cash Flow Hedge Asset, at Fair Value	0
Foreign Exchange Forward Contracts and Put Options [Member] \| Other Accounts Receivable [Member]
Note 7 - Derivative Instruments (Details) [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	162,000	$ 0
Research and Development Expense [Member]
Note 7 - Derivative Instruments (Details) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	23,000
Selling and Marketing Expense [Member]
Note 7 - Derivative Instruments (Details) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	2,000
General and Administrative Expense [Member]
Note 7 - Derivative Instruments (Details) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 4,000

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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