Annual report pursuant to Section 13 and 15(d)

Long-Term Debt (Aggregate maturities of long-term debt and revolving lines of credit) (Details)

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Long-Term Debt (Aggregate maturities of long-term debt and revolving lines of credit) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Long-Term Debt [Abstract]    
2017 $ 22,712  
Thereafter  
Total future long-term debt payments 22,712  
Unamortized discount (814) $ (2,582)
Total carrying amount of long-term debt 21,898 20,133
Less current portion $ (21,898)  
Long-term debt obligations   $ 20,133