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Loans Payable (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Long-term, Total $ 6 $ 1,668
Long-term, Debt Discounts 0 0
Long-term, Total, net of debt discounts 6 1,668
Short-term, Total 2,067 1,277
Short-term, Debt Discounts (6) (22)
Short-term, Total, net of debt discounts 2,061 1,255
Chang Family Trust    
Debt Instrument [Line Items]    
Long-term, Total   1,126
Short-term, Total 1,216  
Chang Family Trust    
Debt Instrument [Line Items]    
Long-term, Total   516
Short-term, Total 557  
Glen J. Krevlin    
Debt Instrument [Line Items]    
Short-term, Total 250 250
Accredited investor    
Debt Instrument [Line Items]    
Short-term, Total 0 700
Accredited Investor    
Debt Instrument [Line Items]    
Short-term, Total 0 160
Accredited Investor    
Debt Instrument [Line Items]    
Short-term, Total 0 80
Ascentium Capital, LLC    
Debt Instrument [Line Items]    
Short-term, Total 0 22
Ascentium Capital, LLC    
Debt Instrument [Line Items]    
Long-term, Total 4 16
Short-term, Total 28 26
Royal Bank America Leasing, L.P.    
Debt Instrument [Line Items]    
Short-term, Total 5 28
Ascentium Capital, LLC    
Debt Instrument [Line Items]    
Long-term, Total 2 10
Short-term, Total $ 11 $ 11