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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:    
Cash received from customers and grants $ 6,465,602us-gaap_ProceedsFromCustomers $ 7,035,382us-gaap_ProceedsFromCustomers
Cash paid to suppliers and employees (7,408,585)us-gaap_PaymentsToSuppliersAndEmployees (7,687,516)us-gaap_PaymentsToSuppliersAndEmployees
Interest received 1,175us-gaap_ProceedsFromInterestReceived 1,830us-gaap_ProceedsFromInterestReceived
Interest paid 0us-gaap_InterestPaid 0us-gaap_InterestPaid
Net cash (used in) operating activities (941,808)us-gaap_NetCashProvidedByUsedInOperatingActivities (650,304)us-gaap_NetCashProvidedByUsedInOperatingActivities
Acquisition of and deposits on fixed assets (406,968)us-gaap_PaymentsToAcquireMachineryAndEquipment (66,789)us-gaap_PaymentsToAcquireMachineryAndEquipment
Payments to Acquire Intangible Assets (450,000)us-gaap_PaymentsToAcquireIntangibleAssets 0us-gaap_PaymentsToAcquireIntangibleAssets
Net cash (used in) investing activities (856,968)us-gaap_NetCashProvidedByUsedInInvestingActivities (66,789)us-gaap_NetCashProvidedByUsedInInvestingActivities
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from option exercises 0us-gaap_ProceedsFromStockOptionsExercised 153,834us-gaap_ProceedsFromStockOptionsExercised
Net cash provided by financing activities 0us-gaap_NetCashProvidedByUsedInFinancingActivities 153,834us-gaap_NetCashProvidedByUsedInFinancingActivities
(DECREASE) IN CASH AND CASH EQUIVALENTS (1,798,776)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (563,259)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents - beginning of the period 4,614,538us-gaap_CashAndCashEquivalentsAtCarryingValue 9,650,275us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents - end of the period 2,815,762us-gaap_CashAndCashEquivalentsAtCarryingValue 9,087,016us-gaap_CashAndCashEquivalentsAtCarryingValue
RECONCILIATION OF NET (LOSS) TO NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES:    
Net (Loss) (646,817)us-gaap_NetIncomeLoss (224,739)us-gaap_NetIncomeLoss
Adjustments:    
Depreciation and amortization 345,731us-gaap_DepreciationDepletionAndAmortization 172,702us-gaap_DepreciationDepletionAndAmortization
Deferred taxes (227,500)us-gaap_DeferredIncomeTaxExpenseBenefit (142,896)us-gaap_DeferredIncomeTaxExpenseBenefit
Share based compensation 109,309us-gaap_ShareBasedCompensation 70,430us-gaap_ShareBasedCompensation
Changes in assets and liabilities:    
Accounts receivable 78,788us-gaap_IncreaseDecreaseInAccountsReceivable 1,222,309us-gaap_IncreaseDecreaseInAccountsReceivable
Inventories (60,324)us-gaap_IncreaseDecreaseInInventories (415,877)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets (140,424)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (19,439)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Deposits and other assets (162)us-gaap_IncreaseDecreaseInDepositOtherAssets (271,773)us-gaap_IncreaseDecreaseInDepositOtherAssets
Accounts payable and accrued liabilities (556,086)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities (1,041,021)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Customer deposits and deferred revenue 155,677cemi_CustomerDepositsAndDeferredRevenueOfOperatingActivities 0cemi_CustomerDepositsAndDeferredRevenueOfOperatingActivities
Net cash (used in) operating activities (941,808)us-gaap_NetCashProvidedByUsedInOperatingActivities (650,304)us-gaap_NetCashProvidedByUsedInOperatingActivities
Supplemental disclosures for non-cash investing and financing activities:    
Deposits on manufacturing equipment transferred to fixed assets $ 20,017cemi_DepositsOnManufacturingEquipmentTransferredToFixedAssets $ 16,410cemi_DepositsOnManufacturingEquipmentTransferredToFixedAssets