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EXCEL - IDEA: XBRL DOCUMENT - BIOSHAFT WATER TECHNOLOGY, INC.Financial_Report.xls
10-Q/A - AMENDED QUARTERLY REPORT - BIOSHAFT WATER TECHNOLOGY, INC.bshf_10qa.htm
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EX-31.2 - CERTIFICATION - BIOSHAFT WATER TECHNOLOGY, INC.bshf_ex312.htm
EX-31.1 - CERTIFICATION - BIOSHAFT WATER TECHNOLOGY, INC.bshf_ex311.htm
EX-32.2 - CERTIFICATION - BIOSHAFT WATER TECHNOLOGY, INC.bshf_ex322.htm
EX-32.1 - CERTIFICATION - BIOSHAFT WATER TECHNOLOGY, INC.bshf_ex321.htm
v2.4.0.6
LOANS PAYABLE: Estimated fair value of the derivative liability (Details) (USD $)
3 Months Ended
Jul. 31, 2012
Apr. 30, 2012
Exercise price, derivative liability $ 0.025 $ 0.025
Risk free interest rate, derivative liability 0.70% 1.40%
Volatility rate, derivative liability 56.00% 161.00%
Expected life of options 11 days 6 months