XML 23 R22.htm IDEA: XBRL DOCUMENT v2.4.1.9
Preferred Stock (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Preferred Stock (Textual)  
Conversion of stock, Description
The Series A and Series C stock conversion ratio is 100 to 1 shares. The Series B, B-1, D, E and F stock conversion ratio is 1 to 1 shares.
Deemed dividend beneficial conversion feature on convertible preferred stock $ 192,558drne_DeemedDividendOnConvertiblePreferredStock
Series A Preferred Stock [Member]  
Preferred Stock (Textual)  
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
Series B-1 Preferred Stock [Member]  
Preferred Stock (Textual)  
Preferred stock liquidation, Description
The Series B-1 preferred stock contains a liquidation provision whereas in the event of a fundamental transaction (such as the merger which occurred on June 3, 2014), the shareholder has the option to receive a preferential amount of cash equal to 400% of the stated value per share.