Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2021	Apr. 30, 2021
Cover [Abstract]
Document Type	10-Q/A
Amendment Flag	true
Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Registrant Name	LENSAR, INC.
Entity Central Index Key	0001320350
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		10,932,703
Entity Shell Company	false
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	LNSR
Security Exchange Name	NASDAQ
Entity File Number	001-39473
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	32-0125724
Entity Address, Address Line One	2800 Discovery Drive
Entity Address, City or Town	Orlando
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	32826
City Area Code	888
Local Phone Number	536-7271
Document Quarterly Report	true
Document Transition Report	false
Amendment Description	LENSAR, Inc. (“the Company”) filed its Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2021 with the Securities and Exchange Commission on May 6, 2021 (the “Original Filing”). The Company is filing this Form 10-Q/A, Amendment No. 1 solely to amend the text of Exhibit 31.1 and 31.2 of the Original Filing to include paragraph 4(b) and the introductory language in paragraph 4 referring to internal control over financial reporting as defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Except as described above, no other changes have been made to the Original Filing.