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Debt - Summary of Debt Activities (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Total debt $ 376 $ 1,916
DSIT Line-of-credit [Member]    
Total debt 979
DSIT Borrowings Against Receivables [Member]    
Total debt 862
DSIT Borrowings Against Receivables [Member]    
Total debt  
OmniMetrix Borrowings Against Receivables [Member]    
Total debt $ 376
DSIT Loan Balance [Member]    
Total debt   $ 75