Note 6 - Stockholders' Equity (Tables)

6 Months Ended

Sep. 30, 2017

Notes Tables

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

	Six Months Ended
	September 30, 2017
Risk-free interest rate		1.91	%
Dividend yield		0	%
Expected volatility		54.00	%
Expected term in years		6.08
Weighted average fair value at grant date	$	1.81

	Period Ended
	September 30, 2016
	Three Months			Six Months
Risk-free interest rate		1.19	%		1.19	%
Dividend yield		0	%		0	%
Expected volatility		51.92	%		51.92	%
Expected term in years		6.08			6.08
Weighted average fair value at grant date	$	0.88		$	0.88

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 July 1, 2017		4,574		$	3.02		146		$	3.93
Granted		-		$	-		115		$	1.99
Exercised /Released		-		$	-		(172	)	$	2.61
Cancelled		(124	)	$	3.49		-		$	-
Outstanding at September 30, 2017		4,450		$	3.01		89		$	3.96
Vested and expected to vest		4,235		$	3.05

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

	Shares Available for Grant
	(in thousands)
Balance at July 1, 2017		538
Options:
Shares added to the plans		1
Cancelled		79
Restricted Stock Units:
Granted		(115	)
Balance at September 30, 2017		503

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		103		8.71		36	$	1.35
$1.64	—	$1.64		1,953		8.28		782	$	1.64
$1.75	—	$2.00		543		8.61		137	$	1.78
$2.59	—	$3.99		460		8.56		195	$	3.45
$4.32	—	$4.32		634		7.83		343	$	4.32
$5.18	—	$6.30		369		6.98		273	$	5.95
$6.61	—	$6.61		328		4.25		285	$	6.61
$6.83	—	$6.83		50		6.39		50	$	6.83
$7.20	—	$7.20		5		1.41		5	$	7.20
$11.40	—	$11.40		5		0.89		5	$	11.40
$1.35	—	$11.40		4,450		7.85		2,111	$	3.63

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

	Three Months Ended				Six Months Ended
	September 30, 2017		September 30, 2016		September 30, 2017		September 30, 2016
Cost of revenues	$	92	$	65	$	121	$	125
Research and development		101		61		164		115
Sales and marketing		139		189		231		352
General and administrative		288		393		690		645
Impact on net loss	$	620	$	708	$	1,206	$	1,237