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PRIVATE PLACEMENT OFFERING (Details 3) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Warrants outstanding      
Exercise price      
Annual dividend yield      
Risk-free interest rate      
Expected volatility      
At transaction date    
Warrants outstanding 6,909,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
/ us-gaap_SubsidiarySaleOfStockAxis
= cpka_AtTransactionDateMember
 
Exercise price $ 0.15us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_SubsidiarySaleOfStockAxis
= cpka_AtTransactionDateMember
 
Annual dividend yield 4.01%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_SubsidiarySaleOfStockAxis
= cpka_AtTransactionDateMember
 
Expected life (years) 5 years  
Risk-free interest rate 4.14%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_SubsidiarySaleOfStockAxis
= cpka_AtTransactionDateMember
 
Expected volatility 53.94%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_SubsidiarySaleOfStockAxis
= cpka_AtTransactionDateMember