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2. Prepaid Expenses (Details) (USD $)
Oct. 31, 2014
Apr. 30, 2014
Prepaid expenses $ 400,674us-gaap_PrepaidExpenseCurrent $ 0us-gaap_PrepaidExpenseCurrent
Prepaid consulting [Member]    
Prepaid expenses 232,810us-gaap_PrepaidExpenseCurrent
/ us-gaap_BalanceSheetLocationAxis
= SELT_PrepaidConsultingMember		 0us-gaap_PrepaidExpenseCurrent
/ us-gaap_BalanceSheetLocationAxis
= SELT_PrepaidConsultingMember
Hotel deployment partnership agreement [Member]    
Prepaid expenses 98,000us-gaap_PrepaidExpenseCurrent
/ us-gaap_BalanceSheetLocationAxis
= SELT_HotelDeploymentMember		 0us-gaap_PrepaidExpenseCurrent
/ us-gaap_BalanceSheetLocationAxis
= SELT_HotelDeploymentMember
Deposits on Inventory [Member]    
Prepaid expenses 69,500us-gaap_PrepaidExpenseCurrent
/ us-gaap_BalanceSheetLocationAxis
= SELT_DepositsOnInventoryMember		 0us-gaap_PrepaidExpenseCurrent
/ us-gaap_BalanceSheetLocationAxis
= SELT_DepositsOnInventoryMember
Other [Member]    
Prepaid expenses $ 364us-gaap_PrepaidExpenseCurrent
/ us-gaap_BalanceSheetLocationAxis
= SELT_OtherPrepaidMember		 $ 0us-gaap_PrepaidExpenseCurrent
/ us-gaap_BalanceSheetLocationAxis
= SELT_OtherPrepaidMember