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3. Accounts Receivables (Tables)
6 Months Ended
Jun. 30, 2017
Receivables [Abstract]  
Schedule of accounts receivables
(Dollars in thousands)  June 30, 2017   December 31, 2016 
         
U.S. and State Government  $191   $103 
Commercial   884    778 
Allowance for doubtful accounts        
Total  $1,075   $881