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3. Accounts Receivables (Tables)
3 Months Ended
Mar. 31, 2017
Receivables [Abstract]  
Schedule of accounts receivables
 (Dollars in thousands) March 31, 2017   December 31, 2016  
             
U.S. and State Government $ 163   $ 103  
Commercial   791     778  
Allowance for doubtful accounts        
Total $ 954   $ 881