Annual report pursuant to Section 13 and 15(d)

Concentrations (Details)

v2.4.1.9
Concentrations (Details) (USD $)
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2012
Nov. 30, 2011
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Nov. 30, 2012
Debt issuance cost           $ 1,500,000us-gaap_DebtIssuanceCosts  
Percentage of Capacity 67.00%corr_PercentageofCapacity            
Revenue related to the DOD contract   84.00%corr_PercentageOfRevenueRelatedToDepartmentOfDefenseContract 71.00%corr_PercentageOfRevenueRelatedToDepartmentOfDefenseContract 88.00%corr_PercentageOfRevenueRelatedToDepartmentOfDefenseContract 80.00%corr_PercentageOfRevenueRelatedToDepartmentOfDefenseContract    
Percentage of amounts due from the department of defense in relation to consolidated accounts receivable 90.00%corr_PercentageOfAmountsDueFromDepartmentOfDefenseInRelationToConsolidatedAccountsReceivable     90.00%corr_PercentageOfAmountsDueFromDepartmentOfDefenseInRelationToConsolidatedAccountsReceivable 91.00%corr_PercentageOfAmountsDueFromDepartmentOfDefenseInRelationToConsolidatedAccountsReceivable    
Percentage of payment to supplier of natural gas in relation to cost of sales   58.00%corr_PercentageOfPaymentToSupplierOfNaturalGasInRelationToCostOfSales   61.00%corr_PercentageOfPaymentToSupplierOfNaturalGasInRelationToCostOfSales 41.00%corr_PercentageOfPaymentToSupplierOfNaturalGasInRelationToCostOfSales   29.00%corr_PercentageOfPaymentToSupplierOfNaturalGasInRelationToCostOfSales
Key Bank [Member] | Secured Debt [Member]              
Debt issuance cost       501,000us-gaap_DebtIssuanceCosts
/ us-gaap_CreditFacilityAxis
= us-gaap_SecuredDebtMember
/ us-gaap_LineOfCreditFacilityAxis
= corr_KeyBankMember 		1,000,000us-gaap_DebtIssuanceCosts
/ us-gaap_CreditFacilityAxis
= us-gaap_SecuredDebtMember
/ us-gaap_LineOfCreditFacilityAxis
= corr_KeyBankMember