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BUSINESS COMBINATIONS (Details) - USD ($)
 3 Months Ended 9 Months Ended
Oct. 31, 2017
Oct. 31, 2016
Oct. 31, 2017
Oct. 31, 2016
BUSINESS COMBINATIONS (Details) [Line Items]        
Selling, General and Administrative Expense $ 7,347,000 $ 5,082,000 $ 17,528,000 $ 14,315,000
Income Tax Expense (Benefit) (5,735,000) 5,740,000 (1,043,000) 11,771,000
Net Income (Loss) Attributable to Parent $ 13,168,000 $ 8,938,000 $ 20,653,000 $ 19,952,000
Earnings Per Share, Basic and Diluted (in Dollars per share) $ 2.00 $ 1.36 $ 3.13 $ 3.03
Payments to Acquire Businesses, Gross     $ 12,049,000  
Refined Coal [Member]        
BUSINESS COMBINATIONS (Details) [Line Items]        
Business Acquisition, Percentage of Voting Interests Acquired 95.35%   95.35%  
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual     $ 200,000  
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual     4,500,000  
Payments to Acquire Businesses, Gross     12,049,000  
Business Acquisition, Transaction Costs $ 2,100,000   2,100,000  
Pro Forma [Member] | Refined Coal [Member]        
BUSINESS COMBINATIONS (Details) [Line Items]        
Costs and Expenses   $ 692,000 1,385,000 $ 2,077,000
Selling, General and Administrative Expense (2,077,000)   (2,140,000) 2,140,000
Income Tax Expense (Benefit) 789,000 (263,000) 287,000 (1,602,000)
Net Income (Loss) Attributable to Parent $ 1,228,000 $ (409,000) $ 447,000 $ (2,493,000)
Earnings Per Share, Basic and Diluted (in Dollars per share) $ 0.19 $ (0.06) $ 0.07 $ (0.38)