Mineral Interests (Detail) (USD $)	0 Months Ended		12 Months Ended						0 Months Ended	12 Months Ended
	Sep. 30, 2010	Dec. 15, 2009	Jan. 31, 2012	Jan. 31, 2013	Feb. 27, 2009	Jan. 31, 2013 Tournigan USA Inc [Member]	Jan. 31, 2012 Tournigan USA Inc [Member]	Feb. 27, 2009 Tournigan USA Inc [Member]	Dec. 22, 2010 Tournigan Energy Ltd [Member]	Jan. 31, 2013 Tournigan Energy Ltd [Member]	Jan. 31, 2013 1% NSR Royalty [Member]	Dec. 15, 2009 Promissory Notes [Member]
Business Acquisition, Percentage of Voting Interests Acquired						100.00%		100.00%
Reclamation Bond, Part Payment, Amount of First Installment		$ 100,000	$ 35,000		$ 930,000		$ 325,327	$ 325,327				$ 100,000
Business Acquisition, Percentage of Contributing Working Interest					30.00%
Business Acquisition, Percentage of Net Profits Interest					5.00%
Reclamation Bond, First Installment due Date		Dec. 31, 2008
Reclamation Bond, Subsequent Installment due Date	Dec. 31, 2008
Repayments of Debt			410,860						130,000
Due to Related Parties										600,000
Debt Instrument, Decrease, Forgiveness										600,000
Royalty Revenue										10,000,000	5,000,000
Royalty Expense										3,000,000
Mineral Properties, Accumulated Impairment				$ 309,500