XML 33 R56.htm IDEA: XBRL DOCUMENT v2.4.0.6

Segment, Customer and Geographic Information (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment Customer and Geographic Information (Additional Textual) [Abstract]
Government grants and cooperative agreements	$ 0	$ 0	$ 91	$ 436
Government grants and cooperative agreements [Member]
Segment, Customer and Geographic Information (Textual) [Abstract]
Company's total product revenue from significant customers			1.00%	3.00%

X

- Details

Name:	cers_SegmentCustomerAndGeographicInformationAdditionalTextualAbstract
Namespace Prefix:	cers_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	cers_SegmentCustomerAndGeographicInformationTextualAbstract
Namespace Prefix:	cers_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Revenue earned during the period from non-repayable sum of money awarded to an entity to carry out a specific purpose as provided in grant agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(e))

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

+ Details

Name:	us-gaap_RevenueFromGrants
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration