Concentrations (Details Textual)	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011
Concentrations (Textual)
Customers accounted for 10% or more of the revenue from forged rolled rings and related components segment

Number of customers accounted for segment revenue.

No definition available.

Name:	cws_NumberOfCustomersAccountedForSegmentRevenue
Namespace Prefix:	cws_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration