Share-Based Payments (Tables)

3 Months Ended

Jul. 31, 2013

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 expense was recognized as follows (in thousands):

	Three Months Ended July 31,
	2013		2012
General and administrative		419		570
Sales and marketing		63		82
Research and development		13		24
TOS cost of sales		8		8
POS cost of sales		49		55
Total stock-based compensation expense		552		739

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 three months ended July 31, 2013 and 2012 were as follows (in thousands):

	Three Months Ended July 31,
	2013		2012
Expected term in years		6.0		6.0
Risk-free interest rates		1.38% to 1.91%		0.8% to 0.9%
Volatility		96.4% to 100.6%		98.5% to 98.8%
Dividend yield		0%		0%

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

The Company’s stock options activity for the three months ended July 31, 2013 is as follows:

									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		-		310,000		310,000		0.53
Forfeited		-		(12,500)		(12,500)		0.50
Expired		-		(26,250)		(26,250)		0.75
Outstanding, July 31, 2013		765,000		13,396,455		14,161,455		0.85		6.8		3,062,000
Vested and expected to vest as of July 31, 2013		765,000		13,396,455		14,161,455		0.85		6.8		3,062,000
Exercisable as of July 31, 2013		488,334		12,077,370		12,565,704		0.85		6.7		2,703,000

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

A summary of the activity related to restricted stock grants is as follows (in thousands):

			Weighted
			Average
			Grant Date
	Total		Fair Value
	Shares		Per Share
Nonvested, May 1, 2013		50,000	$	0.30
Granted		-		-
Vested		(25,000)		0.30
Forfeited		-		-
Expired		-		-
Nonvested as of July 31, 2013		25,000		0.30

Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block]

Activity related to these warrants, which expire at various dates through April 2016, 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, 2013		3,276,667	$	0.61		3.9	$	-
Granted		-		-		-		-
Exercised		-		-		-		-
Expired		-		-		-		-
Outstanding, July 31, 2013		3,276,667	$	0.61		3.7	$	1,462,000