Accounts Receivable

12 Months Ended

Dec. 31, 2017

Accounts Receivable

Accounts Receivable

4. Accounts Receivable

         Accounts receivable, net consist of the following:

	December 31,
	2017			2016
Billed receivables	$	199,201		$	116,148
Unbilled receivables		28,449			20,982
Other		5,779			4,510
Less: Allowance for doubtful accounts		(3,725	)		(3,219	)
	$	229,704		$	138,421

         Unbilled receivables represent balances recognized as revenue that have not been billed to the customer. The Company's allowance for doubtful accounts is based on a policy developed by historical experience and management judgment. Adjustments to the allowance for doubtful accounts may occur based on market conditions or specific customer circumstances.