12. Stockholders' Equity (Deficiency) (Details 1) (USD $)	3 Months Ended	4 Months Ended
Jul. 31, 2013	Apr. 30, 2013
Number of Options Granted		658,914
Number of Options Exercised
Number of Options Forfeited		(92,500)
Number of Options Expired
Number of Options Outstanding, Ending		7,344,381
Number of Options Exercisable		2,056,998
Weighted Average Exercise Price Issued		$ 0.35
Weighted Average Exercise Price Exercised
Weighted Average Exercise Price Forfeited		$ 0.35
Weighted Average Exercise Price Expired
Weighted Average Exercise Price Outstanding, Ending		$ 0.35
Weighted Average Exercise Price Exercisable		$ 0.35
Weighted Average Remaining Contractual Life (in years) Outstanding		4 years 4 months 24 days
Weighted Average Remaining Contractual Life (in years) Exercisable		4 years 4 months 24 days
Aggregate Intrinsic Value Granted
Aggregate Intrinsic Value Exercised
Aggregate Intrinsic Value Forfeited/canceled
Aggregate Intrinsic Value Outstanding, Ending
Aggregate Intrinsic Value Exercisable
Warrant [Member]
Number of Options Outstanding, Beginning	7,256,522
Number of Options Granted	1,115,026	1,833,770
Number of Options Exercised
Number of Options Forfeited	(40,000)
Number of Options Expired
Number of Options Outstanding, Ending	10,165,318	7,256,522
Number of Options Exercisable		9,090,292
Weighted Average Exercise Price Outstanding, Beginning	$ 0.45
Weighted Average Exercise Price Issued		$ 0.50
Weighted Average Exercise Price Exercised
Weighted Average Exercise Price Forfeited	$ 0.50
Weighted Average Exercise Price Expired
Weighted Average Exercise Price Outstanding, Ending	$ 0.45	$ 0.45
Weighted Average Exercise Price Exercisable		$ 0.46
Weighted Average Remaining Contractual Life (in years) Outstanding	4 years 1 month 6 days	4 years 4 months 24 days
Weighted Average Remaining Contractual Life (in years) Exercisable	4 years 1 month 6 days	4 years 4 months 24 days
Aggregate Intrinsic Value Outstanding, Beginning
Aggregate Intrinsic Value Granted
Aggregate Intrinsic Value Exercised
Aggregate Intrinsic Value Forfeited/canceled
Aggregate Intrinsic Value Outstanding, Ending	51,862
Aggregate Intrinsic Value Exercisable	$ 51,862	$ 32,349

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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The combined weighted average of the accumulated differences between the fair values on underlying shares and exercises prices to acquire such shares as of the grant date on options that were either forfeited or lapsed.

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The grant-date intrinsic value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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