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Financial Statements (Details)	3 Months Ended
Financial Statements (Details)	Mar. 29, 2013	Mar. 30, 2012
Financial Statements
Billable days	63 days	64 days

X

- Definition

Billable days.

+ References

No definition available.

+ Details

Name:	ctgx_BillableDays
Namespace Prefix:	ctgx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ctgx_FinancialStatementsTextualAbstract
Namespace Prefix:	ctgx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration