Note 9 - Share Option and Equity Incentive Plan (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	Three months ended June 30,				Six m onths e nded June 3 0 ,
(in thousands)	201 8		201 7		2018		2017
Cost of revenue	$	60	$	43	$	72	$	86
Research and development		210		171		498		331
Sales and marketing		97		445		712		870
General and administrative		555		775		1,464		1,473
Total share-based compensation	$	922	$	1,434	$	2,746	$	2,760