Note 6 - Goodwill and Acquisition-related Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]

	December 31, 2017
	Gross Amount		Accumulated Amortization			Net Amount
Know-how	$	1,018	$	(704	)	$	314
Developed technologies		6,466		(5,829	)		637
Total	$	7,484	$	(6,533	)	$	951

	December 31, 2016
	Gross Amount		Accumulated Amortization			Net Amount
Know-how	$	1,018	$	(500	)	$	518
Developed technologies		6,466		(3,982	)		2,484
Total	$	7,484	$	(4,482	)	$	3,002

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

2018	$	841
2019		110
Total	$	951