Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

v2.3.0.15
Document And Entity Information (USD $)
12 Months Ended
Sep. 30, 2011
Nov. 14, 2011
Mar. 31, 2011
Document and Entity Information [Abstract]      
Entity Registrant Name Clearfield, Inc.    
Document Type 10-K    
Current Fiscal Year End Date --09-30    
Entity Common Stock, Shares Outstanding   12,313,497  
Entity Public Float     $ 55,627,729
Amendment Flag false    
Entity Central Index Key 0000796505    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Smaller Reporting Company    
Entity Well-known Seasoned Issuer No    
Document Period End Date Sep. 30, 2011
Document Fiscal Year Focus 2011    
Document Fiscal Period Focus FY