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Accounts Receivable
6 Months Ended
Jun. 30, 2016
Accounts Receivable [Abstract]  
ACCOUNTS RECEIVABLE

6. ACCOUNTS RECEIVABLE

Credit is extended based upon an evaluation of the customer’s financial condition and, while collateral is not required, the Company periodically receives surety bonds that guarantee payment.  Credit terms are consistent with industry standards and practices.  The amounts of trade accounts receivable at June 30, 2016 and December 31, 2015 have been reduced by an allowance for doubtful accounts of $1,417 and $1,485, respectively.