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Schedule II - Valuation and Qualifying Accounts (Details) - Valuation and Qualifying Accounts (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Valuation and Qualifying Accounts [Abstract] |  |  |
Deferred tax asset valuation allowance, beginning balance | $ 65,272 us-gaap_DeferredTaxAssetsValuationAllowance | $ 60,041 us-gaap_DeferredTaxAssetsValuationAllowance | $ 54,788 us-gaap_DeferredTaxAssetsValuationAllowance
Additions charged to costs and expenses | 6,667 cdzi_TaxValuationAllowanceAdditionsChargedToCostsAndExpenses | 5,231 cdzi_TaxValuationAllowanceAdditionsChargedToCostsAndExpenses | 5,253 cdzi_TaxValuationAllowanceAdditionsChargedToCostsAndExpenses
Deferred tax asset valuation allowance, ending balance | $ 71,939 us-gaap_DeferredTaxAssetsValuationAllowance | $ 65,272 us-gaap_DeferredTaxAssetsValuationAllowance | $ 60,041 us-gaap_DeferredTaxAssetsValuationAllowance

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- Definition Represents the deferred tax asset valuation allowance additions charged to costs and expenses during the period. + References No definition available. + Details
Name: | cdzi_TaxValuationAllowanceAdditionsChargedToCostsAndExpenses
Namespace Prefix: | cdzi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
Name: | us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_ValuationAndQualifyingAccountsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration