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Stockholders' Equity (Details)
 12 Months Ended 48 Months Ended 156 Months Ended
Dec. 10, 2019
USD ($)
shares
Aug. 16, 2016
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
item
shares
Dec. 31, 2005
shares
Dec. 31, 2018
shares
Stockholders' Equity          
Shares of common stock sold   7,043,750      
Price per share of common stock sold (in dollars per share) | $ / shares   $ 12.35      
Proceeds from equity offering | $   $ 82,900,000      
Common Stock, Shares, Outstanding     107,269,201   107,231,155
General and Administrative Expense [Member]          
Equity-Based Compensation          
Compensation cost | $ $ 337,000        
2002 Stock Incentive Plan          
Equity-Based Compensation          
Maximum number of shares provided for grant under equity-based incentive compensation plan     2,000,000    
Number of vesting requirements | item     0    
Number of shares available for grant under the plan, Beginning     1,944,428    
Shares Granted in 2019     (38,046) (55,572) 0
Number of shares available for grant under the plan, Ending     1,906,382   1,944,428
Compensation cost | $     $ 337,000    
2002 Stock Incentive Plan | Non Employee Director          
Equity-Based Compensation          
Shares Granted in 2019 (38,046)        
Underwriter Overallotment Option          
Stockholders' Equity          
Shares of common stock sold   918,750