Share-Based Payments (Tables)

9 Months Ended

Jan. 31, 2016

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 (table in thousands):

	Three Months Ended				Nine Months Ended
	January 31,				January 31,
	2016		2015		2016		2015
General and administrative	$	488	$	474	$	1,600	$	1,530
Sales and marketing		27		114		173		447
Research and development		49		65		262		267
TOS cost of sales		2		2		28		20
POS cost of sales		1		2		27		20
Total stock-based compensation expense	$	567	$	657	$	2,090	$	2,284

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 and nine months ended January 31, 2016 and 2015 were as follows:

	Three Months Ended		Nine Months Ended
	January 31,		January 31,
	2016	2015	2016	2015
Expected term in years	2.5 - 6	-	2.5 - 6	3 - 6
Risk-free interest rates	0.995% - 1.75%	-	0.995% - 1.77%	0.79% - 1.94%
Volatility	82.72% - 91.98%	-	82.72% - 92.32%	85.8% - 102.1%
Dividend yield	0%	-	0%	0%

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

The Company’s stock options activity for the nine months ended January 31, 2016 was as follows:

									Weighted
							Weighted		Average
			Directors				Average		Remaining		Aggregate
	Non-		and				Exercise		Contractual		Intrinsic
	Employees		Employees		Total		Price		Life (Years)		Value
Outstanding, May 1, 2015		57,917		1,946,085		2,004,002	$	5.74		6.7	$	4,166,000
Granted		-		331,582		331,582		5.33		8.9		-
Exercised		-		-		-		-
Forfeited		-		(38,140)		(38,140)		6.64
Expired		(6,667)		(78,206)		(84,873)		6.91
Outstanding, January 31, 2016		51,250		2,161,321		2,212,571		5.61		6.4	$	1,000
Vested and expected to vest as of January 31, 2016		51,250		2,161,321		2,212,571		5.61		6.4	$	1,000
Exercisable as of January 31, 2016		34,271		1,644,223		1,678,494		5.76		5.8	$	1,000

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:

					Weighted
			Weighted		Average
	Number		Average		Remaining		Aggregate
	of		Exercise		Contractual		Intrinsic
	Shares		Price		Life (Years)		Value
Outstanding, May 1, 2015		2,109,840	$	5.54		4.6	$	3,764,871
Granted		-		-		-		-
Exercised		-		-		-		-
Expired		-		-		-		-
Outstanding, January 31, 2016		2,109,840	$	5.54		3.9	$	-