XML 15 R1.htm IDEA: XBRL DOCUMENT v3.19.3
Document And Entity Information - shares
 6 Months Ended
Sep. 30, 2019
Oct. 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 Accelerated Filer  
Entity Current Reporting Status Yes  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Common Stock, Shares Outstanding (in shares)   4,365,061
Entity Shell Company false  
Document Type 10-Q  
Document Period End Date Sep. 30, 2019  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Title of 12(b) Security Common Stock