Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2018

When performance obligations are not transferred to a customer at the end of a reporting period, the amount allocated to those performance obligations are deferred until control of these performance obligations is transferred to the customer. The following table presents the rollforward of the contract liabilities, which is included in the Company's current and long-term deferred revenue line items in the condensed consolidated balance sheets:

(in thousands)
Balance at December 31, 2017	$	30,491
Adoption of new accounting standard (ASC 606)		42,379
Balance at January 1, 2018		72,870
Deferral of revenue		5,761
Recognition of revenue included in beginning of year contract liability		(12,302	)
Balance at March 31, 2018	$	66,329

Disaggregation of Revenue

We operate in one business segment. Therefore, results of our operations are reported on a consolidated basis for purposes of segment reporting, consistent with internal management reporting. For the three months ended March 31, 2018, there was a nominal difference between revenues recognized under ASC 606 and revenues recognized based on the prior revenue recognition guidance for the same period. For the three months ended March 31, 2018, the Company's revenues disaggregated by the major sources was as follows:

(in thousands)	Three Months Ended March 31, 2018
	U.S. Government		Non-U.S. Government		Total
Product sales	$	66,025	$	9,746	$	75,771
Contract manufacturing		-		26,178		26,178
Contracts and grants		14,806		1,059		15,865
Total revenues	$	80,831	$	36,983	$	117,814