Convertible promissory notes (Narrative) (Details) (USD $)	9 Months Ended
	Oct. 31, 2012 D M
Convertible Promissory Notes 1	10.00%
Convertible Promissory Notes 2	$ 730,174
Convertible Promissory Notes 3	3,730,174
Convertible Promissory Notes 4	857,420
Convertible Promissory Notes 5	526,971
Convertible Promissory Notes 6	60.00%
Convertible Promissory Notes 7	10,000,000
Convertible Promissory Notes 8	30
Convertible Promissory Notes 9	12
Convertible Promissory Notes 10	45
Convertible Promissory Notes 11	1,000,000
Convertible Promissory Notes 12	1,000,000
Convertible Promissory Notes 13	5
Convertible Promissory Notes 14	815,000
Convertible Promissory Notes 15	1,000,000
Convertible Promissory Notes 16	1,000,000
Convertible Promissory Notes 17	10
Convertible Promissory Notes 18	3,730,174
Convertible Promissory Notes 19	$ 857,420
Convertible Promissory Notes 20	$ 0.0232
Convertible Promissory Notes 21	197,741,128
Convertible Promissory Notes 22	45