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Note 12 - Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Federal	$ 577	$ (593)	$ (3,386)
State	(66)	63	(344)
Foreign	(682)	(37)
Total current	(171)	(567)	(3,730)
Federal	1,497	(633)	(220)
State	480	(17)	(10)
Foreign	748	115	470
Total	2,725	(535)	240
Change in valuation allowance	(833)	(332)	(285)
Total deferred	1,877	(439)	4
Tax benefit (provision)	$ 1,721	$ (1,434)	$ (3,775)

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