Quarterly report pursuant to Section 13 or 15(d)

9. WARRANTS (Details)

v2.4.1.9
9. WARRANTS (Details) (Warrants, USD $)
6 Months Ended
Oct. 31, 2014
Warrants
 
Warrants outstanding, beginning balance 57,665,600us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
Warrants exercised (550,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
Warrants issued 854,308us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
Warrants outstanding, ending balance 57,969,908us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
Warrants exercisable 57,969,908us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
Weighted average exercise price outstanding, beginning balance $ 0.18us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
Weighted average exercise price outstanding, ending balance $ 0.18us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
Weighted average exercise price exercisable $ 0.18us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
Weighted average fair value per share outstanding, beginning balance $ 0.065us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
Weighted average fair value per share outstanding, ending balance $ 0.065us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
Weighted average fair value per share exercisble $ 0.066nvlx_WeightedAverageFairValuePerShareExercisble
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
Range of Exercise Prices, warrants $0.075, $0.12, and $0.18
Number outstanding 57,969,908us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
Weighted average contractual life 3 years 2 months 8 days