2.4.0.8000120 - Disclosure - 11. Preferred Stocktruefalsefalse1false falsefalseY13Q2http://www.sec.gov/CIK0001399306duration2013-04-01T00:00:002013-06-30T00:00:001true 1us-gaap_DisclosureTextBlockAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Notes2false 2us-gaap_PreferredStockTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse0011. PREFERRED STOCK   On January 25, 2011 the Company filed an amendment to its Nevada Certificate of Designation to create two new series of preferred stock:   <ol start="1" type="A" style='margin-top:0in'> <li style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%;margin-bottom:0in;margin-bottom:.0001pt;text-align:justify;line-height:normal'>Preferred Series A - par value $0.001 - 10,000,000 shares authorized</li> <li style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%;margin-bottom:0in;margin-bottom:.0001pt;text-align:justify;line-height:normal'>Preferred Series B  - par value $0.001 10,000,000 shares authorized</li> </ol>   The preferred stock may be converted at will to common stock in the ratio of 0.005 preferred share to one common share.   On January 31, 2012, 2,076,000 shares of Preferred Series A stock were issued in completion of the agreement signed January 20, 2011, wherein the Company acquired100% of the outstanding common stock of Joaquin Basin Resources, Inc., owner of an oil & gas property. There being no market for the shares, they were valued at the prevailing market price of $0.01 for the number of post-conversion shares of common stock. The value, $4,152,000, was assigned to the cost of the Joaquin Basin oil & gas property.   On January 31, 2012, 111,000 shares of Series A Preferred Stock were converted to 22,200,000 shares of common stock at the conversion ratio of .005 preferred to 1 common. The securities exchanged had equal value, resulting in no gain or loss on the transaction.   As at March 31, 2012, 10,000,000 Series A preferred shares and 10,000,000 Series B preferred shares of par value $0.001 were authorized, of which 1,965,000 Series A were issued and outstanding, (nil as at March 31, 2011).   On April 23, 2012, 80,000 shares of Series A Preferred Stock were converted to 16,000,000 shares of common stock at the conversion ratio of .005 preferred to 1 common. The securities exchanged had equal value, resulting in no gain or loss on the transaction.   On August 14, 2012, 328,000 shares of Series A Preferred Stock were converted to 65,600,000 shares of common stock at the conversion ratio of .005 preferred to 1 common, according to the attributes of the preferred stock. The securities exchanged had equal value, resulting in no gain or loss on the transaction.   On October 12, 2012, 125,000 shares of Series A Preferred Stock were converted into 25,000,000 shares of common stock at the conversion ratio of .005 preferred to 1 common. The securities exchanged had equal value, resulting in no gain or loss on the transaction.   As at March 31, 2013, 10,000,000 Series A preferred shares and 10,000,000 Series B preferred shares of par value $0.001 were authorized, of which 1,432,000 Series A shares were issued and outstanding, (1,965,000 shares as at March 31, 2012).   As at June 30, 2013, 10,000,000 Series A preferred shares and 10,000,000 Series B preferred shares of par value $0.001 were authorized, of which 1,432,000 Series A shares were issued and outstanding, (1,885,000 shares as at June 30, 2012).  falsefalsefalsenonnum:textBlockItemTypenaThe entire disclosure for terms, amounts, nature of changes, rights and privileges, dividends, and other matters related to preferred stock.No definition available.false011. Preferred Stockfalse11. Preferred StockUnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.gridpetroleum.com/20130630/role/idr_Disclosure11PreferredStock12