Share-Based Payments (Tables)

12 Months Ended

Apr. 30, 2015

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

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

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

	Year Ended April 30,
	2015		2014

General and administrative	$	2,204	$	2,298
Sales and marketing		561		352
Research and development		352		36
TOS cost of sales		23		56
POS cost of sales		22		65

Total stock-based compensation expense	$	3,162	$	2,807

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

Black-Scholes assumptions used to calculate the fair value of options granted during the years ended April 30, 2015 and 2014 were as follows:

	Year Ended April 30,
	2015		2014

Expected term in years		2.5 - 6.0		3.0 - 6.0
Risk-free interest rates		0.8% - 1.9%		0.7% - 2.4%
Volatility		86% - 102%		84% - 102%
Dividend yield		0%		0%

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

The Company’s stock options activity and related information as of and for the years ended April 30, 2015 and 2014 is as follows (dollars in thousands):

									Weighted
							Weighted		Average
			Directors				Average		Remaining		Aggregate
	Non-		and				Exercise		Contractual		Intrinsic
	Employees		Employees		Total		Price		Life (Years)		Value

Outstanding, May 1, 2014		765,000		22,586,037		23,351,037	$	1.01		7.5	$	985,000
Granted		80,000		21,080,562		21,160,562		0.66
Exercised		-		(3,750)		(3,750)		0.49
Canceled		-		(19,872,875)		(19,872,875)		1.04
Forfeited		-		(151,250)		(151,250)		0.96
Expired		(150,000)		(285,704)		(435,704)		0.99

Outstanding, April 30, 2015		695,000		23,353,020		24,048,020		0.48		6.7	$	4,166,000

Vested and expected to vest as of April 30, 2015		695,000		23,353,020		24,048,020				6.7	$	4,166,000

Vested as of April 30, 2015		487,500		16,623,580		17,111,080		0.49		5.9	$	2,879,000

									Weighted
							Weighted		Average
			Directors				Average		Remaining		Aggregate
	Non-		and				Exercise		Contractual		Intrinsic
	Employees		Employees		Total		Price		Life (Years)		Value

Outstanding, May 1, 2013		765,000		13,125,205		13,890,205	$	0.85		7.0	$	89,000
Granted		-		9,793,332		9,793,332		1.23
Exercised		-		(33,750)		(33,750)		0.63
Canceled		-		-		-		-
Forfeited		-		(72,500)		(72,500)		0.82
Expired		-		(226,250)		(226,250)		0.73

Outstanding, April 30, 2014		765,000		22,586,037		23,351,037		1.01		7.5	$	985,000

Vested and expected to vest as of April 30, 2014		765,000		22,586,037		23,351,037				7.5	$	985,000

Vested as of April 30, 2014		522,292		13,042,285		13,564,577		0.85		6.1	$	927,000

Schedule Of Share Based Compensation Warrants Activity [Table Text Block]

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

					Weighted
			Weighted		Average
	Number		Average		Remaining		Aggregate
	of		Exercise		Contractual		Intrinsic
	Shares		Price		Life (Years)		Value

Outstanding, May 1, 2014		3,276,667	$	0.61		2.9	$	984,333
Granted		22,191,415		0.47		4.9		3,108,271
Exercised		-		-		-		-
Forfeited		-		-		-		-
Expired		(150,000)		-		-		-

Outstanding, April 30, 2015		25,318,082	$	0.49		4.6	$	3,247,604

					Weighted
			Weighted		Average
	Number		Average		Remaining		Aggregate
	of		Exercise		Contractual		Intrinsic
	Shares		Price		Life (Years)		Value

Outstanding, May 1, 2013		3,276,667	$	0.61		3.9	$	-
Granted		-		-		-		-
Exercised		-		-		-		-
Forfeited		-		-		-		-
Expired		-		-		-		-

Outstanding, April 30, 2014		3,276,667	$	0.61		2.9	$	984,333