Note 11 - Computation of Basic and Diluted Net Loss Per Share (Tables)

9 Months Ended

Dec. 31, 2018

Notes Tables

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

	Three Months Ended				Nine Months Ended
	December 31, 2018		December 31, 2017		December 31, 2018		December 31, 2017
	(in thousands)				(in thousands)
Options		4,101		4,176		4,101		2,241
Unvested restricted stock units		120		37		96		52
Warrants		1,748		2,262		1,748		2,262
Total common stock equivalents excluded from diluted net loss per common share		5,969		6,475		5,945		4,555