Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2018

Disaggregation of Revenue

Revenues for the three- and six-month periods ended June 30, 2018 and 2017 were as follows:

(in thousands, except percentages)	Three months ended June 30,											Six months ended June 30,
	2018			2017		$ Change			% Change			2018		2017		$ Change			% Change
Product revenue	$	47,743		$	32,434	$	15,309			47.2	%	$	92,542	$	63,003	$	29,539			46.9	%
Royalty and other revenue		(12	)		21		(33	)		(157.1	%)		19		42		(23	)		(54.8	%)
Total revenues	$	47,731		$	32,455	$	15,276			47.1	%	$	92,561	$	63,045	$	29,516			46.8	%

Disaggregation of Revenue from Contracts with Customers by Geographic Region

The following tables disaggregate the Company’s revenue from contracts with customers by geographic region (in thousands).

	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
North America	$	22,481	$	12,437	$	42,491	$	24,089
Europe		19,578		16,155		39,148		32,562
Asia and Australia		5,617		3,604		10,692		5,926
Other		55		259		230		468
Total	$	47,731	$	32,455	$	92,561	$	63,045

Revenue from Significant Customers

Revenue from significant customers is as follows (in thousands):

	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
MilliporeSigma	$	8,679	$	6,049	$	15,390	$	12,504
GE Healthcare		6,777		9,130		14,510		17,390

Summary of Receivables and Deferred Revenue from Contracts with Customers

The following table provides information about receivables and deferred revenue from contracts with customers as of June 30, 2018 (in thousands):

	2018
Balances from contracts with customers only:
Accounts receivable	$	31,713
Deferred revenue		1,175
Revenue recognized in the period relating to:
The beginning deferred revenue balance	$	751
Changes in pricing related to products or services satisfied in previous periods		—
Impairment losses on receivables		—