Description of Business and Significant Accounting Policies (Tables)

9 Months Ended

Jan. 31, 2015

Accounting Policies [Abstract]

Reconciliation of the numerator and denominator used in computing basic and diluted net loss per share

	Three Months ended January 31, 2015
	Loss			Shares		Per share
	(numerator)			(denominator)		amount
Basic net loss per share – net loss and weighted average common shares outstanding	$	(2,296,204	)		2,564,751	$	(.90	)
Effect of dilutive securities – stock options		—			—		—
Effect of dilutive securities – warrants		—			—		—
Diluted net loss per share – net loss, weighted average common shares outstanding and effect of stock options and warrants	$	(2,296,204	)		2,564,751	$	(.90	)

	Three Months ended January 31, 2014
	Loss			Shares		Per share
	(numerator)			(denominator)		amount
Basic net loss per share – net loss and weighted average common shares outstanding	$	(846,786	)		2,104,662	$	(.40	)
Effect of dilutive securities – stock options		—			—		—
Effect of dilutive securities – warrants		—			—		—
Diluted net loss per share – net loss, weighted average common shares outstanding and effect of stock options and warrants	$	(846,786	)		2,104,662	$	(.40	)

	Nine Months ended January 31, 2015
	Loss			Shares		Per share
	(numerator)			(denominator)		amount
Basic net loss per share – net loss and weighted average common shares outstanding	$	(4,562,932	)		2,461,925	$	(1.85	)
Effect of dilutive securities – stock options		—			—		—
Effect of dilutive securities – warrants		—			—		—
Diluted net loss per share – net loss, weighted average common shares outstanding and effect of stock options and warrants	$	(4,562,932	)		2,461,925	$	(1.85	)

	Nine Months ended January 31, 2014
	Loss			Shares		Per share
	(numerator)			(denominator)		amount
Basic net loss per share – net loss and weighted average common shares outstanding	$	(2,066,608	)		1,919,517	$	(1.08	)
Effect of dilutive securities – stock options		—			—		—
Effect of dilutive securities – warrants		—			—		—
Diluted net loss per share – net loss, weighted average common shares outstanding and effect of stock options	$	(2,066,608	)		1,919,517	$	(1.08	)

Summary of option activity

	Shares			Weighted average exercise price		Weighted average remaining contractual life (1)		Aggregate intrinsic value
Balance April 30, 2014		264,244		$	12.42		4.46	$	14,750
Expired		(16,000	)	$	15.42		—		—
Balance January 31, 2015		248,244		$	12.23		4.03		—
Exercisable January 31, 2015		235,744		$	12.75		3.81		—
Expected to vest January 31, 2015		224,000		$	12.23		3.81		—