COMMITMENTS AND CONTINGENCIES (Details Textual) (USD $)			0 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended			9 Months Ended			9 Months Ended
	Jan. 31, 2013	Apr. 30, 2012	Nov. 15, 2012 Zurich [Member]	Jan. 31, 2013 Zurich [Member]	Nov. 30, 2012 Bonds [Member] Zurich [Member]	Jan. 31, 2013 Bonds [Member] Zurich [Member]	Nov. 15, 2012 Bonds [Member] Zurich [Member]	Nov. 12, 2012 Bonds [Member] Zurich [Member]	Jan. 31, 2013 Cooper Project [Member] Bonds [Member]	Jan. 31, 2013 Other Project [Member] Bonds [Member]	Jan. 31, 2013 Zurich and F and D [Member]	Jan. 31, 2013 August 3, 2012 [Member]	Jan. 31, 2013 September 7, 2012 [Member]
Cost Of Cooper Project	$ 16,000,000
Debt Instrument, Periodic Payment												397,000	396,927
Maximum Advances Request	888,000
Repayments of Short-term Debt				793,927					0	0
Debt Instrument, Periodic Payment, Principal					0
Settlement Of Claims				2,421,425		2,421,425
Other Payable							2,758,588	3,298,751
Reclassified Accounts Receivable											4,369,765
Reclassified Accounts Payable											5,863,459
Other Payable Current				1,697,000							1,493,694
Payments For Proceeds From Accounts Receivable			3,703,651	5,822,881
Indemnification Payments				222,000
Additional Indemnification Payments				813,000
Decrease In Other Accounts Payable				591,000
Other payable	$ 2,287,621	$ 0		$ 2,287,621