Note 7 - Computation of Basic and Diluted Net Loss Per Share (Tables)

9 Months Ended

Dec. 31, 2017

Notes Tables

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

	Three Months Ended				Nine Months Ended
	Dec ember 31, 2017		Dec ember 31, 2016		Dec ember 31, 2017		Dec ember 31, 2016
	(in thousands)				(in thousands)
Options		4,176		4,380		2,241		4,224
Unvested restricted stock units		37		108		52		135
Warrants		2,262		2,262		2,262		2,262
Total common stock equivalents excluded from diluted net loss per common share		6,475		6,750		4,555		6,621