COMMITMENTS AND CONTINGENCIES (Details Textual) (USD $)	3 Months Ended
	Jul. 31, 2012
Advances For Payment Of Labor and Labor-Related Benefits	$ 793,927
Cost Of Cooper Project	15,100,000
Maximum Advances Request	888,000
Current and Future Billings Value	2,852,346
Repayments of Short-term Debt	793,927
Cooper Project [Member] | Bonds [Member]
Repayments of Short-term Debt	4,300,000
Other Project [Member] | Bonds [Member]
Repayments of Short-term Debt	723,000
August 3, 2012 [Member]
Debt Instrument, Periodic Payment	397,000
September 7, 2012 [Member]
Debt Instrument, Periodic Payment	$ 396,927