Contract Assets and Contract Liabilities (Tables)

3 Months Ended

Mar. 31, 2018

Revenue From Contract With Customer [Abstract]

Summary of Company's Contract Asset and Contract Liability

Accounts receivable and unbilled, net consisted of the following (in thousands):

	As of
	March 31,			January 1,					December 31,
	2018			2018			Adjustments		2017
Accounts receivable	$	67,616		$	55,599		$	-	$	55,599
Unbilled receivables		43,688			37,906			9,753		28,153
Less: allowance for doubtful accounts		(650	)		(673	)		-		(673	)
Total accounts receivable and unbilled, net	$	110,654		$	92,832		$	9,753	$	83,079

Advanced billings consisted of the following (in thousands):

	As of
	March 31,		January 1,					December 31,
	2018		2018		Adjustments			2017
Advanced billings	$	126,387	$	119,451	$	45,695		$	73,756
Pre-funded study costs	$	-	$	-	$	(57,406	)	$	57,406