Quarterly report pursuant to Section 13 or 15(d)

FBR Sales Agreement (Details Textual)

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FBR Sales Agreement (Details Textual) - Fbr Capital Markets Co [Member] - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Aug. 05, 2016
Jul. 31, 2017
Jun. 30, 2017
Jun. 30, 2017
Federal Board Revenue Sales Agreement [Line Items]        
Stock Issued During Period, Value, New Issues $ 40,000,000      
Brokerage Commission percentage 3.00%      
Stock Issued During Period, Shares, New Issues     9,800,000 10,100,000
Proceeds from Issuance of Common Stock     $ 5,600,000 $ 5,900,000
Subsequent Event [Member]        
Federal Board Revenue Sales Agreement [Line Items]        
Stock Issued During Period, Shares, New Issues   338,000    
Proceeds from Issuance of Common Stock   $ 175,000