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Debt (Schedule of Long-Term Debt) (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Total debt $ 5,795 $ 6,265
Less current portion (742) (6,244)
Long-term debt, net of current maturities 5,053 21
Term Credit Facilities [Member]    
Debt Instrument [Line Items]    
Total debt 5,619 5,942
Nexus Promissory Note [Member]    
Debt Instrument [Line Items]    
Total debt 171 316
Capital Lease Obligations [Member]    
Debt Instrument [Line Items]    
Total debt $ 5 $ 7