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Summary of Significant Accounting Policies - Stock Option Expense (Details Narrative) (USD $)
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3 Months Ended | 9 Months Ended | 3 Months Ended | 3 Months Ended | 1 Months Ended | 3 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jan. 31, 2013
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Jan. 31, 2012
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Jan. 31, 2013
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Jan. 31, 2012
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Jan. 31, 2013
Stock Options
Two Thousand One Incentive and Non-statutory Stock Option Plan [Member]
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Jan. 31, 2013
Stock Options
Two Thousand One Incentive and Non-statutory Stock Option Plan [Member]
Minimum
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Jan. 31, 2013
Stock Options
Two Thousand One Incentive and Non-statutory Stock Option Plan [Member]
Maximum
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Jan. 31, 2013
Stock Options
Two Thousand Eleven Incentive and Non-statutory Stock Option Plan [Member]
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Jan. 31, 2013
Stock Options
Two Thousand Eleven Incentive and Non-statutory Stock Option Plan [Member]
Minimum
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Jan. 31, 2013
Stock Options
Two Thousand Eleven Incentive and Non-statutory Stock Option Plan [Member]
Maximum
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Sep. 23, 2010
Nonqualified Stock Options 2010-09-23
Mr. Sheerr
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Sep. 22, 2011
Nonqualified Stock Options 2011-09-22
Mr. Sheerr
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Jul. 19, 2012
Nonqualified Stock Options 2012-07-19
Mr. Sheerr
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Jun. 30, 2008
Stock Options One
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Jan. 31, 2013
Nonqualified Stock Options
Director
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Jan. 31, 2013
Nonqualified Stock Options
Minimum
Director
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Jan. 31, 2013
Nonqualified Stock Options
Maximum
Director
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| Summary of Significant Accounting Policies (Textual) [Abstract] | |||||||||||||||||
| Number of shares allowed for granting under the plan | 300,000 | 33,333 | |||||||||||||||
| Vesting periods for options | 1 year | 5 years | 1 year | 5 years | 1 year | 1 year | 1 year | 1 year | 2 years | ||||||||
| Number of shares granted | 16,667 | 16,667 | 16,667 | 16,667 | 8,333 | ||||||||||||
| Options expiration period | EXPIRE FIVE YEARS AFTER DATE OF GRANT. | EXPIRE FIVE YEARS AFTER DATE OF GRANT. | EXPIRE FIVE YEARS AFTER DATE OF GRANT. | EXPIRE TEN YEARS AFTER THE DATE OF GRANT. | EXPIRE EITHER FIVE OR TEN YEARS AFTER DATE OF GRANT. | ||||||||||||
| Stock-based compensation expense | $ 26,000 | $ 95,000 | $ 205,033 | $ 378,523 | |||||||||||||
| Total unrecognized compensation costs related to stock options | $ 51,000 | $ 51,000 | |||||||||||||||
| Total unrecognized compensation costs related to stock options, Weighted average period for recognition | 6 months | ||||||||||||||||
| Exercise price of options granted | $ 15.60 | ||||||||||||||||
| Percentage of options exercisable on date of grant | 100.00% | ||||||||||||||||