Net Loss Per Share - Calculation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net loss		$ (48,417)	$ (28,162)
Net income (loss) attributable to common stockholders		$ (48,417)	$ (28,162)
Basic and diluted weighted average number of common shares and common share equivalents outstanding	[1]	376,170,545	88,330,996
Net loss per share attributable to common stockholders basic and diluted	[1]	$ (0.13)	$ (0.32)

[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. Because the Corporation had a net loss in the three months ended March 31, 2021 and 2020, the Corporation’s potentially dilutive securities, which include stock options, restricted stock, preferred stock and warrants to purchase shares of common stock and preferred stock, have been excluded from the computation of diluted net loss per share, as the effect would be anti-dilutive. Therefore, the weighted-average number of common shares outstanding used to calculate both basic and diluted net loss per share attributable to common stockholders for these periods is the same.