XML 17 R1.htm IDEA: XBRL DOCUMENT v3.21.1
Document And Entity Information - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2021
May 26, 2021
Sep. 30, 2020
Document Information [Line Items]      
Entity Central Index Key 0000724004    
Entity Registrant Name MESA LABORATORIES INC /CO    
Amendment Flag false    
Current Fiscal Year End Date --03-31    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2021    
Document Type 10-K    
Document Annual Report true    
Document Period End Date Mar. 31, 2021    
Document Transition Report false    
Entity File Number 0-11740    
Entity Incorporation, State or Country Code CO    
Entity Tax Identification Number 84-0872291    
Entity Address, Address Line One 12100 West Sixth Avenue    
Entity Address, City or Town Lakewood    
Entity Address, State or Province CO    
Entity Address, Postal Zip Code 80228    
City Area Code 303    
Local Phone Number 987-8000    
Title of 12(b) Security Common stock, no par value    
Trading Symbol MLAB    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 1,221,000
Entity Common Stock, Shares Outstanding   5,140,981