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Lease Commitments (Detail Textuals) (USD $)
6 Months Ended 0 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Feb. 07, 2013
Citibank, N.A. (the "Sublandlord")
sqft
Operating Leased Assets [Line Items]      
Area of land for lease     44,493
Base rent under the sublease agreement per annum     $ 1,468,269
Security deposit in cash     489,423
Rental expenses 634,000 1,638,000  
Additional short term overlapping rent expense $ 771,000