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3. Accounts Receivable
 3 Months Ended
Mar. 31, 2017
Receivables [Abstract]  
Accounts Receivable

Accounts receivables consist of the following at:

 

 (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  

 

For the three months ended March 31, 2017 and 2016, the largest commercial customer represented 13.7% and 15.7%, respectively, and the largest governmental agency represented 23.5% and 1.4%, respectively, of the Company’s product revenue. As of March 31, 2017 and December 31, 2016, the largest commercial receivable represented 21.4% and 23.0%, respectively, and the largest governmental receivable represented 17.1% and 11.6%, respectively, of the Company’s accounts receivable.