Annual report pursuant to Section 13 and 15(d)

Fair Value of Warrants - Additional Information (Detail)

v3.21.1
Fair Value of Warrants - Additional Information (Detail) - $ / shares
Dec. 31, 2020
Dec. 31, 2019
Fair Value Disclosures [Abstract]    
Fair value of stock prices in computing fair value of warrants outstanding (usd per share) $ 2.77 $ 5.96