Subsequent Events - Additional Information (Details) - Subsequent Event - Topcon America Corporation [Member] $ in Millions	Mar. 02, 2021 USD ($) shares
Asset Purchase Agreement And Distribution Agreement
Subsequent Event [Line Items]
Shares agreed to be purchased purchase price	$ 10.0
Number of shares agreed to be acquired by investor | shares	1,618,122
Proceeds from issuance of common stock	$ 9.5
Equity method investment, description of principal activities	The Distribution Agreement and Topcon’s appointment will, unless terminated earlier, continue on a country-by-country basis for a period of ten (10) years from the date exclusivity is granted
Asset Purchase Agreement
Subsequent Event [Line Items]
Share lockup period	6 months