Equity Incentive Plans - Restricted Stock Units (Details) - Restricted stock units	6 Months Ended
	Jun. 30, 2022 $ / shares shares
Number of RSUs
Outstanding balance, beginning (in shares) | shares	3,529,000
Granted (in shares) | shares	1,980,000
Vested (in shares) | shares	(3,714,000)
Forfeited (in shares) | shares	(121,000)
Outstanding balance, ending (in shares) | shares	1,674,000
Weighted-Average Grant Date Fair Value Per Share
Outstanding balance, beginning (in dollars per share) | $ / shares	$ 2.04
Granted (in dollars per share) | $ / shares	0.81
Vested (in dollars per share) | $ / shares	1.26
Forfeited (in dollars per share) | $ / shares	2.85
Outstanding balance, ending (in dollars per share) | $ / shares	$ 2.26