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Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of activity of our unvested restricted common shares
The following table summarizes the activity of our unvested restricted Common Shares for the years ended December 31, 2017 and 2016:
 
Unvested Restricted Common Shares
 
 
 
Weighted-Average
 
Number of
 
Grant-Date
 
Shares
 
Fair Value
 
 
 
 
Unvested at December 31, 2015
168,449
 
$11.44
Vested
—
 
—
Unvested at December 31, 2016
168,449
 
$11.44
Vested
—
 
—
Unvested at December 31, 2017
168,449
 
$11.44
Schedule of activity for outstanding stock options
The following table summarizes the activity for outstanding stock options:
 
Options Outstanding
 
 
 
 
 
Weighted-Average
 
 
 
 
 
Weighted-Average
 
Remaining
 
 
 
Number of
 
Exercise
 
Contractual Term
 
Aggregate
 
Shares
 
Price
 
(in years)
 
Intrinsic Value (1)
 
 
 
 
 
 
 
 
Balance at December 31, 2015
667

 
$
33.75

 
1.25
 
$
—

Granted
—

 
—

 
 
 
 
Exercised
—

 
—

 
 
 
 
Canceled / forfeited / expired
—

 
$
—

 
 
 
 
Balance at December 31, 2016
667

 
$
33.75

 
1.25
 
$
—

Granted
—

 
—

 
 
 
 
Exercised
—

 
—

 
 
 
 
Canceled / forfeited / expired
—

 
—

 
 
 
 
Balance at December 31, 2017
667

 
$
33.75

 
1.25
 
$
—

Vested and exercisable as of December 31, 2017
—

 
$
—

 
0
 
$
—



(1) 
The aggregate intrinsic value is calculated as approximately the difference between the weighted average exercise price of the underlying awards and the Company’s estimated current fair market value at December 31, 2017. Because the weighted average exercise price exceeds fair market value at December 31, 2017, there is no aggregate intrinsic value for the options.