Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Major Customer Concentration (Details)

v2.4.1.9
Note 7 - Major Customer Concentration (Details) (Accounts Receivable [Member], Customer Concentration Risk [Member])
 6 Months Ended 12 Months Ended
Mar. 31, 2015
Sep. 30, 2014
Customer B [Member]    
Note 7 - Major Customer Concentration (Details) [Line Items]    
Concentration Risk, Percentage 16.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= clfd_CustomerBMember 		 
Customer D [Member]    
Note 7 - Major Customer Concentration (Details) [Line Items]    
Concentration Risk, Percentage   10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= clfd_CustomerDMember