XML 26 R1.htm IDEA: XBRL DOCUMENT v3.20.1
Document And Entity Information - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2020
May 26, 2020
Sep. 30, 2019
Document Information [Line Items]      
Entity Registrant Name MESA LABORATORIES INC /CO    
Entity Central Index Key 0000724004    
Trading Symbol mlab    
Current Fiscal Year End Date --03-31    
Entity Filer Category Large Accelerated Filer    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer Yes    
Entity Emerging Growth Company false    
Entity Small Business false    
Entity Interactive Data Current Yes    
Entity Common Stock, Shares Outstanding (in shares)   4,394,116  
Entity Public Float     $ 973.4
Entity Shell Company false    
Document Type 10-K    
Document Period End Date Mar. 31, 2020    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Amendment Flag false    
Title of 12(b) Security Common stock, no par value