Current report filing

Document and Entity Information

Document and Entity Information
Aug. 31, 2022
Document and Entity Information [Abstract]  
Document Type 8-K
Document Period End Date Aug. 31, 2022
Entity Incorporation, State or Country Code MN
Entity File Number 0-17272
Entity Tax Identification Number 41-1427402
Entity Address, Address Line One 614 McKinley Place NE
Entity Address, City or Town Minneapolis
Entity Address State Or Province MN
Entity Address, Postal Zip Code 55413
City Area Code 612
Local Phone Number 379-8854
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock
Trading Symbol TECH
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Entity Central Index Key 0000842023
Amendment Flag false