Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Significant Accounting Policies (Details)

v3.5.0.2

Significant Accounting Policies (Details)	3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended
Significant Accounting Policies (Details)	Sep. 30, 2016 USD ($) $ / shares	Sep. 30, 2015 $ / shares	Jun. 30, 2016 USD ($)	Sep. 30, 2016 USD ($) item $ / shares	Sep. 30, 2015 $ / shares	Dec. 31, 2013 USD ($)
Net Loss Per Share of Common Stock, Basic and Diluted
Difference between basic net loss per share and diluted net loss per share \| $ / shares	$ 0	$ 0		$ 0	$ 0
Restricted Cash [Abstract]
Certificate of deposit supporting lease obligation						$ 175,000
Annual reduction permitted or requested in restricted cash, as a percent			33.00%			33.00%
Annual reduction permitted or requested in restricted cash			$ 58,000			$ 58,000
Number of periods reduction may be allowed						3 years
Security deposit required, end of third year						$ 13,000
Grant Revenue Recognition
Revenue recognized on grant	$ 321,497			$ 971,985
Segment information
Number of Operating Segments \| item				1
Computers and software
Property and Equipment
Property, Plant and Equipment, Useful Life				4 years
Equipment [Member]
Property and Equipment
Property, Plant and Equipment, Useful Life				5 years
Furniture and Fixtures [Member]
Property and Equipment
Property, Plant and Equipment, Useful Life				5 years
National Institute On Drug Abuse (Member)
Grant Revenue Recognition
Research and development grant award				$ 1,000,000
Revenue recognized on grant	$ 321,497			971,985
Proceeds received for revenue earned under grant				$ 592,729

- Definition

The amount of difference between basic net income (loss) per share and diluted net income (loss) per share due to the impact of anti-dilutive items during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	cerc_
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Balance Type:	na
Period Type:	duration

- Definition

Cash received for revenue earned under the grant award previously recognized as deferred revenue.

+ References

No definition available.

+ Details

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Namespace Prefix:	cerc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of the research and development grant awarded.

+ References

No definition available.

+ Details

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Namespace Prefix:	cerc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

n/a

+ References

No definition available.

+ Details

Name:	cerc_RestrictedCashAbstract
Namespace Prefix:	cerc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The estimated annual reduction in the security required to be provided against the obligation as long as there has been no event of default.

+ References

No definition available.

+ Details

Name:	cerc_RestrictedCashEstimatedAnnualReduction
Namespace Prefix:	cerc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The estimated annual reduction in the security required to be provided against the obligation as long as there has been no event of default, as a percent of the total security.

+ References

No definition available.

+ Details

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- Definition

The number of periods at the beginning of the lease term where, at the end of each period, an annual reduction in security would be permitted as long as there has been no event of default.

+ References

No definition available.

+ Details

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- Definition

The amount of security deposit to be required at the expiration of the third year of the lease term.

+ References

No definition available.

+ Details

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Namespace Prefix:	cerc_
Data Type:	xbrli:monetaryItemType
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- References

No definition available.

+ Details

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

No definition available.

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- References

No definition available.

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- 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=26872669&loc=d3e20235-122688

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- References

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- References

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