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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 |  |  |  |
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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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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