Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2021	Dec. 31, 2020
Preferred stock, par value (in dollars per share)	$ 0.001
Preferred stock, authorized (in shares)	5,000,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	150,000,000	150,000,000
Common stock, issued (in shares)	13,009,477	3,347,389
Common stock, outstanding (in shares)	13,009,477	3,347,389
Series X redeemable convertible preferred stock
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, authorized (in shares)	36,758	36,758
Preferred stock, issued (in shares)	31,455	0
Preferred stock, outstanding (in shares)	31,455	0