Note 9 - Computation of Basic and Diluted Net Loss Per Share (Tables)

9 Months Ended

Dec. 31, 2016

Notes Tables

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

	Three Months Ended				Nine Months Ended
	December 31, 2016		December 31, 2015		December 31, 2016		December 31, 2015
	(in thousands)				(in thousands)
Options		4,380		2,075		4,224		1,612
Unvested restricted stock units		108		234		135		190
Warrants		2,262		2,262		2,262		2,262
Total common stock equivalents excluded from diluted net loss per common share		6,750		4,571		6,621		4,064