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Long-Term Debt, net - Annual Loan Principal Payments (Table) (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance $ 38,555 $ 37,163
Loan Balance 42,800  
(a) EnTrust    
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance 37,000  
(b) Firment    
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance 800  
(c) Convertible Note    
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance 5,000  
Not later than one year    
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance 5,000  
Not later than one year | (a) EnTrust    
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance 0  
Not later than one year | (b) Firment    
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance 0  
Not later than one year | (c) Convertible Note    
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance 5,000  
Later than one year and not later than two years    
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance 3,785  
Later than one year and not later than two years | (a) EnTrust    
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance 2,985  
Later than one year and not later than two years | (b) Firment    
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance 800  
Later than one year and not later than two years | (c) Convertible Note    
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance 0  
Later than two years    
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance 34,015  
Later than two years | (a) EnTrust    
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance 34,015  
Later than two years | (b) Firment    
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance 0  
Later than two years | (c) Convertible Note    
Disclosure of detailed information about borrowings [Line Items]    
Loan Balance $ 0