Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

Document And Entity Information
6 Months Ended
Mar. 31, 2015
Apr. 27, 2015
Document and Entity Information [Abstract]    
Entity Registrant Name Clearfield, Inc.  
Document Type 10-Q  
Current Fiscal Year End Date --09-30  
Entity Common Stock, Shares Outstanding   13,715,833dei_EntityCommonStockSharesOutstanding
Amendment Flag false  
Entity Central Index Key 0000796505  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Filer Category Accelerated Filer  
Entity Well-known Seasoned Issuer No  
Document Period End Date Mar. 31, 2015  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q2