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Commitments and Contingencies - Employment Agreements (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 01, 2015
Oct. 03, 2014
Jun. 01, 2005
Jun. 30, 2017
Dec. 31, 2016
Mr. Rami S. Ramadan | Employment agreements          
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]          
Perpetually renewable employment term       1 year  
Annual compensation pursuant to the employment agreement       $ 225 $ 450
Number of days prior to a Change of Control       120 days  
Number of months after a Change of Control       24 months  
Period after termination where the Company will pay certain terms and conditions       2 years  
Director of Development | Employment agreements          
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]          
Perpetually renewable employment term     3 years 3 years  
Notice period required to notify employee that employment agreement will not be renewed     60 days 60 days  
Automatic renewal period of employment agreement     3 years 3 years  
Severance payment if employment agreement is not renewed 3 months        
Change of control agreements          
Severance payment term     1 year 1 year  
KMEs | Change of control severance agreements          
Change of control agreements          
Severance payment term   1 year      
Term of health insurance coverage included in severance agreement   1 year      
Time period in which an employee can voluntarily terminate employment after a change of control event and still receive salary and health insurance benefits   1 year