Reverse Capitalization - Summary of Retroactive Application of Reverse Capitalization to Consolidated Statements of Operations and Comprehensive Loss (Detail)
3 Months Ended 12 Months Ended
Mar. 31, 2021
$ / shares
shares
Mar. 31, 2020
$ / shares
shares
Dec. 31, 2020
$ / shares
shares
Dec. 31, 2019
$ / shares
shares
Retroactive Application of Reverse Capitalization to Consolidated Statements of Operations and Comprehensive Loss [Line Items]        
Net loss per share attributable to common stockholders basic and diluted $ (0.13) $ (0.32)    
Weighted average shares outstanding, basic and diluted | shares 376,170,545 [1] 88,330,996 [1] 88,691,582 87,829,419
Conversion ratio     2.0681 2.0681
Reverse Capitalization [Member]        
Retroactive Application of Reverse Capitalization to Consolidated Statements of Operations and Comprehensive Loss [Line Items]        
Net loss per share attributable to common stockholders basic and diluted     $ (1.54) $ (4.14)
Previously Reported [Member]        
Retroactive Application of Reverse Capitalization to Consolidated Statements of Operations and Comprehensive Loss [Line Items]        
Net loss per share attributable to common stockholders basic and diluted     $ (3.18) $ (8.56)
Weighted average shares outstanding, basic and diluted | shares     42,886,067 42,469,175
[1] Prior period results have been adjusted to reflect the exchange of Legacy Clover’s common stock for Clover Class B Common Stock at an exchange ratio of approximately 2.0681 in January 2021 as a result of the Business Combination. See Note 3, “Business combination,” for details.