Capital Stock (Warrants) (Details)	Sep. 30, 2015 $ / shares shares
Warrants Issued on July 17, 2007 and Expiring on February 9, 2016 [Member]
Class of Warrant or Right [Line Items]
Shares Subject to Warrants \| shares	2,384
Exercise Price per Share	$ 12.45
Warrants Issued on September 28, 2007 and Expiring on September 28, 2017 [Member]
Class of Warrant or Right [Line Items]
Shares Subject to Warrants \| shares	72,727
Exercise Price per Share	$ 8.25

Exercise price per share or per unit of warrants or rights outstanding.

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i)(2))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Subparagraph 2

-Article 4

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=cdxs_WarrantsIssuedOnJulySeventeenTwoThousandAndSevenAndExpiringOnFebruaryNineTwoThousandAndSixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=cdxs_WarrantsIssuedOnSeptemberTwentyEightTwoThousandAndSevenAndExpiringOnSeptemberTwentyEightTwoThousandAndSeventeenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: