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STOCKHOLDERS' EQUITY (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Total Warrants 13,078,920us-gaap_ClassOfWarrantOrRightOutstanding
Common Stock Warrant One [Member]  
Issue Date Apr. 26, 2013
Expiration Date Apr. 26, 2018
Total Warrants 69,321us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= mela_CommonStockWarrantOneMember
Ex. Price $ 11.18us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= mela_CommonStockWarrantOneMember
Common Stock Warrant Two [Member]  
Issue Date Oct. 31, 2013
Expiration Date Apr. 30, 2019
Total Warrants 685,715us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= mela_CommonStockWarrantTwoMember
Ex. Price $ 8.50us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= mela_CommonStockWarrantTwoMember
Common Stock Warrant Three [Member]  
Issue Date Feb. 05, 2014
Expiration Date Feb. 05, 2019
Total Warrants 1,329,731us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= mela_CommonStockWarrantThreeMember
Ex. Price $ 7.40us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= mela_CommonStockWarrantThreeMember
Common Stock Warrant Four [Member]  
Issue Date Jul. 24, 2014
Expiration Date Jul. 24, 2019
Total Warrants 6,198,832us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= mela_CommonStockWarrantFourMember
Ex. Price $ 2.45us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= mela_CommonStockWarrantFourMember
Common Stock Warrant Five [Member]  
Issue Date Jul. 24, 2014
Expiration Date Jan. 24, 2016
Total Warrants 4,795,321us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= mela_CommonStockWarrantFiveMember
Ex. Price $ 2.45us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= mela_CommonStockWarrantFiveMember