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BUSINESS COMBINATIONS (Details) - USD ($)	3 Months Ended			6 Months Ended		12 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Apr. 30, 2017	Jul. 31, 2018	Jul. 31, 2017	Jan. 31, 2018	Aug. 10, 2017
BUSINESS COMBINATIONS (Details) [Line Items]
Selling, General and Administrative Expense	$ 6,110,000	$ 4,779,000		$ 10,663,000	$ 10,181,000
Income Tax Expense (Benefit)	(5,631,000)	2,302,000		(8,334,000)	4,692,000
Net Income (Loss) Attributable to Parent	9,217,000	$ 2,941,000		18,713,000	$ 7,485,000
Payments to Acquire Businesses, Gross				12,049,000
Refined Coal [Member]
BUSINESS COMBINATIONS (Details) [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent							95.35%
Income Tax Expense (Benefit)	$ (7,597,000)			$ (11,596,000)
Business Acquisition, Pro Forma Earnings Per Share, Basic (in Dollars per share)		$ 0.06			$ 0.35
Business Acquisition, Pro Forma Revenue						$ 800,000
Business Acquisition, Pro Forma Net Income (Loss)						9,900,000
Payments to Acquire Businesses, Gross						12,049,000
Business Acquisition, Transaction Costs						$ 2,500,000
Refined Coal [Member] | Pro Forma [Member]
BUSINESS COMBINATIONS (Details) [Line Items]
Costs and Expenses			$ 692,000		$ 1,385,000
Selling, General and Administrative Expense					2,510,000
Net Income (Loss) Attributable to Parent		$ 409,000			2,303,000
Refined Coal [Member] | Pro Forma1 Member
BUSINESS COMBINATIONS (Details) [Line Items]
Income Tax Expense (Benefit)		$ 263,000			$ 1,480,000

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