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Financing Transactions (Details Textual) - USD ($)
$ in Millions
Jun. 30, 2016
May 23, 2014
Mar. 25, 2013
Equity Offering [Member]      
Equity Offering [Line Items]      
Maximum Value Of Stocks Issuable Under Stock Offering     $ 15
Commissions Owed To Sales Agent Expressed As Percentage Of Aggregate Gross Proceeds From Each Sale Of Shares 3.00%    
Remaining Value Of Stock Issuable Under Stock Offering $ 3    
Amendment to the Controlled Equity Offering [Member]      
Equity Offering [Line Items]      
Maximum Value Of Stocks Issuable Under Stock Offering   $ 15