Revenue from Contracts with Customers

Disaggregated Revenues

The following table provides information about disaggregated revenue by major product line and primary geographic market (in thousands):



	Three Months Ended June 30, 2019								Six Months Ended June 30, 2019
	Americas		Europe and Middle East		Asia Pacific		Total		Americas		Europe and Middle East		Asia Pacific		Total
Product revenue:
Instruments	$	3,596	$	960	$	384	$	4,940	$	5,786	$	2,490	$	982	$	9,258
Consumables	8,193		2,800		781		11,774		16,368		6,044		1,508		23,920
In vitro diagnostic kits	647		1,866		101		2,614		1,076		3,679		173		4,928
Total product revenue	12,436		5,626		1,266		19,328		23,230		12,213		2,663		38,106
Service revenue	2,167		682		193		3,042		3,962		1,295		357		5,614
Total product and service revenue	14,603		6,308		1,459		22,370		27,192		13,508		3,020		43,720
Collaboration revenue	7,975		—		—		7,975		14,313		—		—		14,313
Total revenues	$	22,578	$	6,308	$	1,459	$	30,345	$	41,505	$	13,508	$	3,020	$	58,033



	Three Months Ended June 30, 2018								Six Months Ended June 30, 2018
	Americas		Europe and Middle East		Asia Pacific		Total		Americas		Europe and Middle East		Asia Pacific		Total
Product revenue:
Instruments	$	3,131	$	1,555	$	802	$	5,488	$	5,817	$	3,040	$	1,305	$	10,162
Consumables	6,801		2,872		608		10,281		12,961		5,249		1,428		19,638
In vitro diagnostic kits	918		1,516		87		2,521		1,599		2,913		175		4,687
Total product revenue	10,850		5,943		1,497		18,290		20,377		11,202		2,908		34,487
Service revenue	1,540		449		105		2,094		2,801		948		193		3,942
Total product and service revenue	12,390		6,392		1,602		20,384		23,178		12,150		3,101		38,429
Collaboration revenue	4,615		—		—		4,615		9,655		—		—		9,655
Total revenues	$	17,005	$	6,392	$	1,602	$	24,999	$	32,833	$	12,150	$	3,101	$	48,084

Contract balances and remaining performance obligations

Contract liabilities are comprised of the current and long-term portions of deferred revenue of $6.9 million and $11.5 million as of June 30, 2019 and December 31, 2018, respectively, and customer deposits of $7.4 million and $8.2 million as of June 30, 2019 and December 31, 2018, respectively, included within the condensed consolidated balance sheets. Total contract liabilities decreased by $5.4 million for the six months ended June 30, 2019 as a result of the recognition of previously deferred revenue of $16.8 million for the completion of certain performance obligations during the period, partially offset by cash payments received of $11.4 million related to our collaborations and service contracts. The Company did not record any contract assets as of June 30, 2019.

Unsatisfied or partially unsatisfied performance obligations related to collaboration agreements as of June 30, 2019 were $7.1 million and are expected to be completed over the period of each collaboration agreement, through December 2019. Performance obligations related to product and service contracts as of June 30, 2019 were $7.1 million and are expected to be completed over the term of the related contract, through February 2024.