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NOTE 1 - NATURE OF OPERATIONS AND BASIS OF PRESENTATION (Details)
 12 Months Ended 12 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 0 Months Ended 0 Months Ended 0 Months Ended 0 Months Ended 0 Months Ended 0 Months Ended 0 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 0 Months Ended
Mar. 31, 2013
USD ($)
Mar. 31, 2012
USD ($)
Mar. 31, 2010
Mar. 31, 2011
American Capital Venture and Maplehurst Investment Group [Member]
Mar. 31, 2011
Red Chip Companies [Member]
USD ($)
Mar. 31, 2011
Consideration for Extension of Loans [Member]
Feb. 28, 2011
Consideration for the Exchange of Notes [Member]
USD ($)
Oct. 09, 2012
Stock Issued for Repayment of Principal and Interest [Member]
USD ($)
Mar. 31, 2011
Stock Issued for Repayment of Principal and Interest [Member]
USD ($)
Apr. 05, 2012
Shares Issued for Extinguishment of Debt [Member]
USD ($)
Mar. 31, 2013
Directors and Employees [Member]
Mar. 31, 2013
Investor Relations Services [Member]
USD ($)
Mar. 31, 2013
IGC - Mauritius (IGC-M) [Member]
Dec. 30, 2011
H&F Ironman Limited ("HK Ironman") [Member]
Jan. 18, 2011
H&F Ironman Limited ("HK Ironman") [Member]
Oct. 01, 2009
Sricon Infrastructure Private Limited (Sricon) [Member]
USD ($)
Mar. 07, 2008
Sricon Infrastructure Private Limited (Sricon) [Member]
Mar. 31, 2013
Sricon Infrastructure Private Limited (Sricon) [Member]
Jun. 21, 2012
Sricon Infrastructure Private Limited (Sricon) [Member]
acre
Mar. 31, 2012
Sricon Infrastructure Private Limited (Sricon) [Member]
Mar. 31, 2011
Sricon Infrastructure Private Limited (Sricon) [Member]
Mar. 31, 2010
Sricon Infrastructure Private Limited (Sricon) [Member]
Mar. 31, 2013
Techni Bharathi Limited ("TBL") [Member]
Mar. 07, 2008
Techni Bharathi Limited ("TBL") [Member]
Mar. 31, 2013
Techni Bharathi Limited ("TBL") [Member]
Feb. 19, 2009
IGC India Mining and Trading Private Limited ("IGC-IMT") [Member]
Mar. 31, 2013
IGC India Mining and Trading Private Limited ("IGC-IMT") [Member]
Jun. 04, 2009
IGC Logistic Private Limited ("IGC-LPL") [Member]
Mar. 31, 2013
IGC Logistic Private Limited ("IGC-LPL") [Member]
Jun. 04, 2009
IGC Materials Private Limited ("IGC-MPL") [Member]
Mar. 31, 2013
IGC Materials Private Limited ("IGC-MPL") [Member]
Dec. 30, 2011
Linxi H&F Economic and Trade Co. ("PRC Ironman") [Member]
Mar. 31, 2013
Linxi H&F Economic and Trade Co. ("PRC Ironman") [Member]
Mar. 31, 2013
Bricoleur Note Payable [Member]
Oct. 09, 2012
Bricoleur Note Payable [Member]
Oct. 16, 2009
Bricoleur Note Payable [Member]
Mar. 31, 2011
Bricoleur Note Payable [Member]
Dec. 31, 2010
Bricoleur Note Payable [Member]
Mar. 31, 2013
Bricoleur Note Payable [Member]
USD ($)
Oct. 16, 2009
Bricoleur Note Payable [Member]
USD ($)
Dec. 30, 2011
H&F Ironman Limited ("HK Ironman") [Member]
Dec. 30, 2011
H&F Ironman Limited ("HK Ironman") [Member]
USD ($)
Mar. 31, 2013
ESOP 2008 Omnibus Plan [Member]
USD ($)
Mar. 31, 2013
Zhang Hua [Member]
Linxi H&F Economic and Trade Co. ("PRC Ironman") [Member]
Jan. 18, 2011
Zhang Hua [Member]
Linxi H&F Economic and Trade Co. ("PRC Ironman") [Member]
Jan. 18, 2011
Zhang Hua [Member]
H&F Ironman Limited ("HK Ironman") [Member]
Mar. 31, 2013
Xu Jianjun [Member]
Linxi H&F Economic and Trade Co. ("PRC Ironman") [Member]
Jan. 18, 2011
Xu Jianjun [Member]
H&F Ironman Limited ("HK Ironman") [Member]
Mar. 31, 2013
Linxi H&F Economic and Trade Co. ("PRC Ironman") [Member]
USD ($)
Mar. 31, 2013
Linxi H&F Economic and Trade Co. ("PRC Ironman") [Member]
CNY
Jan. 18, 2011
Linxi H&F Economic and Trade Co. ("PRC Ironman") [Member]
sqkm
Mar. 31, 2011
H&F Ironman Limited ("HK Ironman") [Member]
Jan. 18, 2011
H&F Ironman Limited ("HK Ironman") [Member]
NOTE 1 - NATURE OF OPERATIONS AND BASIS OF PRESENTATION (Details) [Line Items]                                                                                                          
Equity Method Investment, Ownership Percentage                         100.00%   100.00%     22.00%   22.00% 22.00% 22.00%     100.00%   100.00%   100.00%   100.00%   95.00%                 100.00%   80.00%     20.00%         95.00% 95.00%
Number of Subsidiaries 4                                                                                                        
Number of Investments 1                                                                                                        
Sale of Stock, Percentage of Ownership after Transaction                           100.00%   22.00% 63.00%           100.00% 77.00%   100.00%   100.00%   100.00%   95.00%                           75.00%   20.00%          
Sale of Stock, Percentage of Ownership before Transaction                               63.00%                                                                          
Extinguishment of Debt, Amount (in Dollars)                               $ 17,900,000                                                                          
Noncontrolling Interest, Ownership Percentage by Parent                                     22.00%                                                               95.00%    
Area of Land                                     5                                                               2.2    
Equity Method Investment, Percent of Ownership Aquired                                             23.10%                                                            
Capital                                                                                                 273,800 2,000,000      
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners                                                                                         5.00%                
Number of Operating Segments 1                                                                                                        
Number of Securities Listed 3                                                                                                        
Trading Securities, Description (1) Common Stock, $.0001 par value (ticker symbol: IGC) ("Common Stock"), (2) redeemable warrants to purchase Common Stock (ticker symbol: IGC.WT), and (3) units consisting of one share of Common Stock and two redeemable warrants to purchase Common Stock (ticker symbol: IGC.U). As reported on Form 8-K on February 5, 2013, the Company voluntarily delisted the units from the NYSE MKT and requested its unit holders to contact IGC to get the existing units separated into Common Stock and Warrants.                                                                                                        
Common Stock, Par or Stated Value Per Share (in Dollars per share) $ 0.0001 $ 0.0001                                                                                                      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share) $ 5.00                                                                                                        
Warrant, Expiration Date Mar. 06, 2015                                                                                                        
Warrants, call warrant description The Company has a right to call the warrants, provided the Common Stock has traded at a closing price of at least $8.50 per share for any 20 trading days within a 30-trading day period ending on the third business day prior to the date on which notice of redemption is given. If the Company calls the warrants, either the holder will have to exercise the warrants by purchasing the Common Stock from the Company for $5.00 or the warrants will expire.                                                                                                        
Common Stock, Shares, Issued (in Shares) 6,980,098 6,006,173 12,989,207                                                                                                    
Common Stock, Shares, Outstanding (in Shares) 6,980,098 6,006,173 12,989,207                                                                                                    
Stock Issued During Period, Shares, Issued for Services (in Shares)       30,000 9,135             27,500                                                                                  
Stock Issued During Period, Value, Issued for Services (in Dollars)         8,039             38,750                                                                                  
Stock Issued During Period, Shares, Other (in Shares)           400,000 688,500   1,570,001                                                   34,200 530,000 688,500 200,000                              
Stock Issued During Period, Value, Other (in Dollars) 501,300 2,232,628         419,985   798,176                                                                                        
Stock Issued During Period, Shares, Acquisitions (in Shares)                                                                                 31,500,000                        
Business Combination, Contingent Consideration Arrangements, Description                                                                                 In addition, the Stock Purchase Agreement provides for a contingent payment by IGC of $1 million provided certain post-closing covenants are met within 30 days of closing. These post-closing covenants were not met within 30 days of closing and therefore the Company did not make the payment.                        
Business Combination, Contingent Consideration, Liability, Current (in Dollars)                                                                                   1,000,000                      
Business Combination, Assets and Liabilities Arising from Contingencies, Description                                                                                 (i) $1.5 million in cash or stock, which is contingent on IGC achieving earnings growth of at least 30% from the previous year's closing audit (i.e., March 31, 2011); and (ii) $1.5 million in cash or stock, which is contingent on IGC achieving earnings growth of at least 30% from the previous year's closing audit (i.e., March 31, 2012). If either of the foregoing annual targets were missed, there would still be a payout of $3 million provided IGC achieves a cumulative earnings growth of 69% between fiscal years 2011 and 2013. These post-closing covenants were not met and therefore the Company did not make the payments.                        
Debt Conversion, Original Debt, Amount (in Dollars)               501,300   2,232,627.79                                                                                      
Extinguishment of Debt, Reduction in Annual Interest (in Dollars)                   612,000                                                                                      
Debt Conversion, Converted Instrument, Shares Issued (in Shares)   2,543,775           334,200   442,630                                                 300,000                                    
Debt Instrument, Face Amount (in Dollars)                                                                             $ 1,800,000 $ 2,000,000                          
Debt Instrument, Maturity Date                                                                   Jul. 31, 2014   Oct. 16, 2010 Jun. 30, 2011   Jul. 31, 2014                            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)                                                                                     269,345                    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)                                                                                     $ 7.80                    
Stock Issued During Period, Shares, Share-based Compensation, Gross (in Shares)                     1,018,968