Note 11 - Net Loss Per Ordinary Share (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Year ended December 31,
( $ i n thousands )	201 6			201 5			201 4
Numerator:
Net loss per ordinary share	$	(22,349	)	$	(24,478	)	$	(22,174	)
Denominator:
Weighted-average ordinary shares outstanding-basic		22,353,713			21,781,933			17,310,148
Dilutive effect of ordinary share equivalents resulting from ordinary share options, ordinary share warrants and preferred ordinary shares (as converted)		—			—			—
Weighted-average ordinary shares outstanding-diluted		22,353,713			21,781,933			17,310,148

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	Year ended December 31,
	201 6		201 5		201 4
Options to purchase ordinary shares		1,065,655		1,108,240		1,194,612
Unvested restricted shares and RSUs		329,465		366,739		275,500