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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Revenues by Service Category (Details) - USD ($)
3 Months Ended 12 Months Ended
Jan. 31, 2016
Oct. 31, 2015
Jul. 31, 2015
Apr. 30, 2015
Jan. 31, 2015
Oct. 31, 2014
Jul. 31, 2014
Apr. 30, 2014
Jan. 31, 2016
Jan. 31, 2015
Jan. 31, 2014
Product information                      
Revenues $ 116,386,000 $ 113,967,000 $ 97,434,000 $ 85,488,000 $ 102,325,000 $ 127,564,000 $ 102,030,000 $ 51,191,000 $ 413,275,000 $ 383,110,000 $ 227,455,000
Other income (expense)                      
Foreign Currency                      
Foreign currency gains                 139,000    
Power Industry Services                      
Product information                      
Revenues                 387,636,000 376,676,000 218,649,000
Core Services | Power Industry Services                      
Product information                      
Revenues                 383,378,000 $ 376,676,000 191,597,000
Project Development Success Fees | Power Industry Services                      
Product information                      
Revenues                 $ 4,258,000   $ 27,052,000