XML 17 R70.htm IDEA: XBRL DOCUMENT v2.4.0.6

Convertible preferred stock and preferred stock (Voting) (Details)	Dec. 31, 2011
Convertible preferred stock [Abstract]
Minimum shareholder approval	50.00%

X

- Details

Name:	vcra_ConvertiblePreferredStockAbstract
Namespace Prefix:	vcra_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Minimum shareholder approval, Percentage

+ References

No definition available.

+ Details

Name:	vcra_MinimumShareholderApprovalPercenatge
Namespace Prefix:	vcra_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant