Organization and Operations - Agreement and Plan of Merger (Details) - USD ($) $ / shares in Units, $ in Millions		6 Months Ended
	Jan. 28, 2021	Jun. 30, 2021	Jun. 02, 2021	Dec. 31, 2020
Agreement and Plan of Merger
Common stock, par value (in dollars per share)		$ 0.001		$ 0.001
Series X redeemable convertible preferred stock
Agreement and Plan of Merger
Issuance of preferred stock upon acquisition of Quellis (in shares)		50,504
Common Stock
Agreement and Plan of Merger
Shares issued on acquisition (in shares)		3,332,669
Common Stock | Series X redeemable convertible preferred stock
Agreement and Plan of Merger
Warrants to purchase number of shares			2,805,000
Exercise Price (in dollars per share)			$ 0.35
Quellis Biosciences, Inc | Series X redeemable convertible preferred stock
Agreement and Plan of Merger
Issuance of preferred stock upon acquisition of Quellis (in shares)	50,504
Conversion value on closing date	$ 122.7
Warrants to purchase number of shares	2,805
Exercise Price (in dollars per share)	$ 341.70
Quellis Biosciences, Inc | Common Stock
Agreement and Plan of Merger
Shares issued on acquisition (in shares)	3,332,669
Common stock, par value (in dollars per share)	$ 0.001
Number of options assumed in Quellis Acquisition	332,494
Warrants to purchase number of shares	185,136
Exercise Price (in dollars per share)	$ 0.35