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

6 Months Ended

Sep. 30, 2017

Notes Tables

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

	Three Months Ended				Six Months Ended
	September 30, 2017		September 30, 2016		September 30, 2017		September 30, 2016
	(in thousands)				(in thousands)
Options		4,189		4,206		2,092		4,156
Unvested restricted stock units		50		129		59		179
Warrants		2,262		2,262		2,262		2,262
Total common stock equivalents excluded from diluted net loss per common share		6,501		6,597		4,413		6,597