Document and Entity Information - shares	6 Months Ended
	Sep. 30, 2020	Oct. 26, 2020
Document Information
Document Type	10-Q
Transition Report	false
Document Period End Date	Sep. 30, 2020
Entity Registrant Name	Therapeutics Acquisition Corp.
Title of 12(b) Security	Class A common stock
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	true
Entity Central Index Key	0001811764
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Amendment Flag	false
Trading Symbol	txac
Class A common stock
Document Information
Entity Common Stock, Shares Outstanding		14,041,400
Class B common stock
Document Information
Entity Common Stock, Shares Outstanding		3,392,500