Stock-based Payments (Tables)

12 Months Ended

Apr. 30, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Employee Service Stock-based Compensation, Allocation of Recognized Period Costs

Stock-based compensation costs were recorded as follows (in thousands):

	Year Ended April 30,
	2016		2015
General and administrative	$	2,035	$	2,204
Sales and marketing	198		561
Research and development	308		352
TOS cost of sales	31		23
POS cost of sales	27		22
Total stock-based compensation expense	$	2,599	$	3,162

Schedule of Stock-based Payment Award, Stock Options, Valuation Assumptions

Black-Scholes assumptions used to calculate the fair value of options granted during the years ended April 30, 2016 and 2015 were as follows:

	Year Ended April 30,
	2016	2015
Expected term in years	2.5 - 6.0	2.5 - 6.0
Risk-free interest rates	0.6% - 1.8%	0.8% - 1.9%
Volatility	83% - 93%	86% - 102%
Dividend yield	—%	—%

Schedule of Stock-based Compensation, Stock Options, Activity

The Company’s stock options activity and related information as of and for the years ended April 30, 2016 and 2015 is as follows (dollars in thousands):

	Non- Employees		Directors and Employees		Total		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding, May 1, 2015	57,917		1,946,085		2,004,002		$	5.74	6.7	$	4,166,000
Granted	—		343,749		343,749		5.33
Exercised	—		—		—		—
Canceled	—		—		—		—
Forfeited	—		(42,515	)	(42,515	)	6.90
Expired	(6,667	)	(85,812	)	(92,479	)	6.97
Outstanding, April 30, 2016	51,250		2,161,507		2,212,757		5.58		6.1	$	10,000
Vested and expected to vest as of April 30, 2016	51,250		2,161,507		2,212,757				6.1	$	10,000
Vested as of April 30, 2016	34,271		1,703,035		1,737,306		5.71		5.6	$	9,000

	Non- Employees		Directors and Employees		Total		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding, May 1, 2014	63,750		1,882,170		1,945,920		$	12.12	7.5	$	985,000
Granted	6,667		1,756,714		1,763,381		7.92
Exercised	—		(313	)	(313	)	5.88
Canceled	—		(1,656,073	)	(1,656,073	)	12.48
Forfeited	—		(12,604	)	(12,604	)	11.52
Expired	(12,500	)	(23,809	)	(36,309	)	11.88
Outstanding, April 30, 2015	57,917		1,946,085		2,004,002		5.74		6.7	$	4,166,000
Vested and expected to vest as of April 30, 2015	57,917		1,946,085		2,004,002				6.7	$	4,166,000
Vested as of April 30, 2015	40,625		1,385,298		1,425,923		5.88		5.9	$	2,879,000

Schedule Of Stock-based Compensation Warrants Activity

Activity related to these warrants, which expire at various dates through January 2019, is summarized as follows (dollars in thousands):

	Number of Shares	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding, May 1, 2015	2,109,840	$	5.54	4.6	$	3,248
Granted	—	—		—	—
Exercised	—	—		—	—
Forfeited	—	—		—	—
Expired	—	—		—	—
Outstanding, April 30, 2016	2,109,840	$	5.54	3.6	$	—

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding, May 1, 2014	273,055		$	7.32	2.9	$	984
Granted	1,849,285		5.64		4.9	3,108
Exercised	—		—		—	—
Forfeited	—		—		—	—
Expired	(12,500	)	—		—	—
Outstanding, April 30, 2015	2,109,840		$	5.54	4.6	$	3,248