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STOCKHOLDERS' EQUITY (Details Textual) (USD $)
1 Months Ended
Dec. 08, 2014
Oct. 24, 2014
Mar. 31, 2015
Dec. 31, 2014
Class of Stock [Line Items]        
Preferred Stock, Par or Stated Value Per Share     $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare
Preferred Stock, Shares Authorized     1,000,000us-gaap_PreferredStockSharesAuthorized 1,000,000us-gaap_PreferredStockSharesAuthorized
Common Stock, Par or Stated Value Per Share     $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare
Common Stock, Shares Authorized     29,000,000us-gaap_CommonStockSharesAuthorized 29,000,000us-gaap_CommonStockSharesAuthorized
Common Stock, Shares, Issued     2,677,612us-gaap_CommonStockSharesIssued 2,658,983us-gaap_CommonStockSharesIssued
Common Stock, Shares, Outstanding     2,677,612us-gaap_CommonStockSharesOutstanding 2,658,983us-gaap_CommonStockSharesOutstanding
Common Stock [Member]        
Class of Stock [Line Items]        
Common stock held by the initial stockholders 300,000hdrau_CommonStockHeldByInitialStockholders
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
  7,322,388hdrau_CommonStockHeldByInitialStockholders
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Percentage for initial stockholders consummation 20.00%hdrau_PercentageForInitialStockholdersConsummation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Stock Issued During Period, Shares Cancelled   575,000hdrau_StockIssuedDuringPeriodSharesCancelled
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember