Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Restricted Stock-Narrative) (Details)

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Stockholders' Equity (Restricted Stock-Narrative) (Details) - Restricted Stock Units (RSUs) [Member]
3 Months Ended 12 Months Ended
Aug. 14, 2015
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Feb. 10, 2015
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Jan. 22, 2015
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Mar. 31, 2016
Dec. 31, 2015
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of independent directors, restricted stock units granted | item     3    
Units issued 20,000       82,501
Restricted stock unit grant   20,000 62,501    
Granted 1/22/2015, Vesting Started 1/31/2015 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period       12 months  
Granted 2/10/2015, Vesting Started 2/10/2015 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period       6 months