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Concentrations (Details ) (Purchase [Member])
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Supplier A [Member]
    
Concentration of purchase from suppliers    
Concentration risk supplier, Percentage 20.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= cws_PurchaseMember
/ us-gaap_ConcentrationRiskByTypeAxis
= cws_SuppliersOneMember		 27.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= cws_PurchaseMember
/ us-gaap_ConcentrationRiskByTypeAxis
= cws_SuppliersOneMember
Supplier B [Member]
    
Concentration of purchase from suppliers    
Concentration risk supplier, Percentage 13.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= cws_PurchaseMember
/ us-gaap_ConcentrationRiskByTypeAxis
= cws_SuppliersTwoMember		    [1]
Supplier C [Member]
    
Concentration of purchase from suppliers    
Concentration risk supplier, Percentage 16.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= cws_PurchaseMember
/ us-gaap_ConcentrationRiskByTypeAxis
= cws_SuppliersThreeMember		    [1]
[1] * Less than 10%.