Note 6 - Stockholders' Equity (Tables)

3 Months Ended

Jun. 30, 2017

Notes Tables

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

	Three Months Ended
	June 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

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 April 1, 2017		4,530		$	3.02		181		$	3.94
Granted		65		$	3.44		-		$	-
Exercised/Released		-		$	-		(35	)	$	3.99
Cancelled		(21	)	$	3.95		-		$	-
Outstanding at June 30, 2017		4,574		$	3.02		146		$	3.93
Vested and expected to vest		4,303		$	3.07

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

	Shares Available for Grant
	(in thousands)
Balance at April 1, 2017		594
Options:
Granted from approved plans		(65	)
Cancelled		9
Balance at June 30, 2017		538

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		8.96		29	$	1.35
	$1.64	—	$1.64		2,000		8.65		660	$	1.64
	$1.75	—	$2.00		575		9.12		108	$	1.78
	$2.59	—	$3.99		460		8.81		166	$	3.48
	$4.32	—	$4.32		634		8.08		304	$	4.32
	$5.18	—	$6.61		741		7.11		531	$	6.28
	$6.83	—	$6.83		50		6.64		50	$	6.83
	$7.20	—	$7.20		5		1.66		5	$	7.20
	$11.40	—	$11.40		5		1.15		5	$	11.40
	$18.90	—	$18.90		1		0.04		1	$	18.90
	$1.35	—	$18.90		4,574		8.37		1,859	$	3.75

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

	Three Months Ended
	June 30, 201 7		June 30, 201 6
Cost of revenues	$	28	$	59
Research and development		63		53
Sales and marketing		92		163
General and administrative		403		253
Impact on net loss	$	586	$	528