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Stock based payments and director fees (Detail Textuals)
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 28, 2015
shares
Jun. 30, 2016
USD ($)
shares
Jun. 30, 2016
USD ($)
Director
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Management fees | $   $ 900,000 $ 1,800,000
Management fee paid with shares of stock | $   $ 200,000 $ 500,000
Number of shares issued for payment for management fee | shares   15,684 30,600
Annual retainer amount | $     $ 50,000
Long term incentive plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for issuance under Director Plan | shares   100,000 100,000
Number of independent directors | Director     3
Long term incentive plan | Initial public offering | Restricted stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of restricted stock awards issued to independent directors | shares 2,000   2,000
Vesting period 1 year   1 year