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Subsequent Events (Details) (USD $)
3 Months Ended 0 Months Ended
Mar. 31, 2015
Investor
May 15, 2015
Investor
May 12, 2015
Dec. 31, 2014
Series A Preferred Stock [Member]        
Number of restricted common stock shares issued upon conversion 8,630,000us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
     
Number of investors 4drne_NumberOfInvestors
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
     
Preferred stock, par value $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
    $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
Series A Preferred Stock [Member] | Subsequent Event [Member]        
Number of restricted common stock shares issued upon conversion   3,857,900us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Number of investors   6drne_NumberOfInvestors
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Total shares converted   38,579us-gaap_ConversionOfStockSharesConverted1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesAPreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Series G Preferred Stock [Member] | Subsequent Event [Member]        
Purchase price     $ 0.25us-gaap_SaleOfStockPricePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesGPreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Shares issued     8,000,000us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesGPreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Preferred stock, par value     $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesGPreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Description of convertible preferred stock     Each Unit consists of one share of the Company's Series G Convertible Preferred Stock, par value $0.0001 per share, each of which is convertible into one share of Common Stock.