Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2017
Oct. 30, 2017
Document and Entity Information [Abstract]    
Entity Registrant Name NATUS MEDICAL INC  
Entity Central Index Key 0000878526  
Document Type 10-Q/A  
Document Period End Date Sep. 30, 2017  
Amendment Flag true  
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   31,154,151
Amendment Description To provide the consolidated financial statements and related notes from the Form 10-Q formatted in XBRL (eXtensive Business Reporting Language)