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Note 3 - Deferred Income Taxes (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Casualty loss $ (224,426)us-gaap_DeferredTaxLiabilitiesNoncurrent $ (181,818)us-gaap_DeferredTaxLiabilitiesNoncurrent
Casualty Loss [Member]    
Casualty loss (121,239)us-gaap_DeferredTaxLiabilitiesNoncurrent
/ us-gaap_FairValueByLiabilityClassAxis
= ckx_CasualtyLossMember
(121,239)us-gaap_DeferredTaxLiabilitiesNoncurrent
/ us-gaap_FairValueByLiabilityClassAxis
= ckx_CasualtyLossMember
Deferred Gain [Member]    
Casualty loss $ (103,187)us-gaap_DeferredTaxLiabilitiesNoncurrent
/ us-gaap_FairValueByLiabilityClassAxis
= ckx_DeferredGainMember
$ (60,579)us-gaap_DeferredTaxLiabilitiesNoncurrent
/ us-gaap_FairValueByLiabilityClassAxis
= ckx_DeferredGainMember