XML 36 R54.htm IDEA: XBRL DOCUMENT v2.4.1.9

Stockholders' Equity (Deficit) - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
Stockholders Equity Note [Abstract]
Issuance of common stock, shares	19,297,952ceru_StockIssuedDuringPeriodSharesNewIssuesConversionSecuritiesAndOptionsExercised

X

- Definition

Stock issued during period, shares, new issues, conversion securities and options exercised.

+ References

No definition available.

+ Details

Name:	ceru_StockIssuedDuringPeriodSharesNewIssuesConversionSecuritiesAndOptionsExercised
Namespace Prefix:	ceru_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

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