Note 6 - Stockholders' Equity (Tables)

9 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Period Ended
	December 31, 2017
	Three Months			Nine Months
Risk-free interest rate		2.16	%		2.01	%
Dividend yield		0	%		0	%
Expected volatility		56.00	%		55.00	%
Expected term in years		6.08			6.08
Weighted average fair value at grant date	$	0.98		$	1.47

	Period Ended
	Dec ember 31, 2016
	Three Months			Nine Months
Risk-free interest rate		1.86	%		1.28	%
Dividend yield		0	%		0	%
Expected volatility		58.10	%		52.75	%
Expected term in years		6.08			6.08
Weighted average fair value at grant date	$	1.11		$	0.91

Share-based Compensation, Activity [Table Text Block]

	Options Outstanding					Restricted Stock Units Outstanding
	Number of shares (in thousands)			Weighted average exercise price		Number of shares (in thousands)			Weighted average fair value
Outstanding at October 1, 2017		4,450		$	3.01		89		$	3.96
Granted		47		$	1.81		224		$	1.81
Exercised /Released		(4	)	$	-		(11	)	$	5.66
Cancelled		(207	)	$	4.81		(1	)	$	5.80
Outstanding at December 31, 2017		4,286		$	2.91		301		$	2.30
Vested and expected to vest		4,108		$	2.94

Schedule of Share-based Compensation, Shares Available for Grant [Table Text Block]

	Shares Available for Grant
	(in thousands)
Balance at October 1, 2017		503
Options:
Granted		(47	)
Cancelled		77
Restricted Stock Units:
Granted		(224	)
Cancelled		1
Balance at December 31, 2017		310

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

			Options Outstanding				Options Vested
Range of Exercise Prices per share			Number of Shares (in thousands)		Weighted- Average Remaining Contractual Life (in years)		Number of Shares (in thousands)		Weighted- Average Exercise Price per Share
$1.35	—	$1.35		92		8.39		38	$	1.35
$1.64	—	$1.64		1,925		8.15		873	$	1.64
$1.75	—	$2.00		560		8.75		192	$	1.86
$2.59	—	$3.99		448		8.26		206	$	3.44
$4.32	—	$4.32		627		7.58		378	$	4.32
$5.18	—	$6.30		369		6.73		287	$	5.95
$6.61	—	$6.61		205		6.20		176	$	6.61
$6.83	—	$6.83		50		6.14		50	$	6.83
$7.20	—	$7.20		5		1.16		5	$	7.20
$11.40	—	$11.40		5		0.64		5	$	11.40
$1.35	—	$11.40		4,286		7.91		2,110	$	3.39

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	Three Months Ended				Nine Months Ended
	Dec ember 3 1 , 2017		Dec ember 3 1 , 2016		Dec ember 3 1 , 2017		Dec ember 3 1 , 2016
Cost of revenues	$	23	$	111	$	144	$	236
Research and development		61		66		225		181
Sales and marketing		78		160		309		512
General and administrative		281		293		971		938
Impact on net loss	$	443	$	630	$	1,649	$	1,867