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NOTE 1 - OVERVIEW (Detail) - Schedule of Subsidiaries | 9 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Mar. 31, 2012
IGC - Mauritius (IGC-M) [Member] |  |
Immediate Holding Company | IGC |
Country of Incorportaion | Mauritius |
Percent of Holding | 100.00% | 100.00%
IGC India Mining and Trading Private Limited ("IGC-IMT") [Member] |  |
Immediate Holding Company | IGC-M |
Country of Incorportaion | India |
Percent of Holding | 100.00% | 100.00%
IGC Logistic Private Limited ("IGC-LPL") [Member] |  |
Immediate Holding Company | IGC-M |
Country of Incorportaion | India |
Percent of Holding | 100.00% | 100.00%
IGC Materials Private Limited ("IGC-MPL") [Member] |  |
Immediate Holding Company | IGC-M |
Country of Incorportaion | India |
Percent of Holding | 100.00% | 100.00%
H&F Ironman Limited ("HK Ironman") [Member] |  |
Immediate Holding Company | IGC |
Country of Incorportaion | Hong Kong |
Percent of Holding | 100.00% | 100.00%
Linxi H&F Economic and Trade Co. ("PRC Ironman") [Member] |  |
Immediate Holding Company | HK Ironman |
Country of Incorportaion | Peoples' Republic of China |
Percent of Holding | 95.00% | 95.00%
Techni Bharathi Limited ("TBL") [Member] |  |
Immediate Holding Company | IGC-M |
Country of Incorportaion | India |
Percent of Holding | 77.00% | 77.00%

X
- Definition The country of incorporation. + References No definition available. + Details
Name: | igc_CountryOfIncorportaion
Namespace Prefix: | igc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | instant

X
- Definition The immediate holding company of the subsidiary. + References No definition available. + Details
Name: | igc_ImmediateHoldingCompany
Namespace Prefix: | igc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section H + Details
Name: | us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration