Note 9 - Net Loss Per Share (Tables)

6 Months Ended

Jun. 30, 2015

Notes Tables

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

	Three months ended June 30,				Six m onths e nded June 3 0 ,
	201 5		201 4		201 5		201 4
Options to purchase ordinary shares		1,125,351		1,189,782		1,125,816		1,202,161
Unvested restricted shares		253,740		254,700		253,740		254,700
Unvested restricted share units		108,563		—		108,563		—