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NOTE 2 - SIGNIFICANT ACCOUNTING POLICIES (Tables) | 3 Months Ended
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Jun. 30, 2012
Foreign Currency Exchange Rates [Table Text Block] | The exchange rates used for translation purposes are as follows:
Period |  | Period End Average Rate (P&L rate) |  | Period End Rate (Balance sheet rate)
Three months ended June30, 2011 |  | INR44.56 per USD |  | INR 44.59 per USD
Year ended March 31, 2012 |  | INR47.715 per USD |  | INR 50.89 per USD
|  | RMB 6.29 per USD |  | RMB 6.30 per USD
Three months ended June 30, 2012 |  | INR 53.23 per USD |  | INR 55.57 per USD
|  | RMB 6.31 per USD |  | RMB 6.31 per USD
Estimated Useful Lives [Table Text Block] | Property and equipment are recorded at cost net of accumulated depreciation and depreciated over their estimated useful lives using the straight-line method. The estimated useful lives of assets are as follows:
Buildings | 5-25 years
Plant and machinery | 10-20 years
Computer equipment | 3-5 years
Office equipment | 3-5 years
Furniture and fixtures | 5-10 years
Vehicles | 5-10 years

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- Definition Tabular disclosure of the estimated useful lives of property, plant and equipment. + References No definition available. + Details
Name: | igc_EstimatedUsefulLivesTableTextBlock
Namespace Prefix: | igc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Definition Tabular disclosure of foreign currency exchange rates during the period. + References No definition available. + Details
Name: | igc_ForeignCurrencyExchangeRatesTableTextBlock
Namespace Prefix: | igc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration