Balance Sheet Details - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Oct. 05, 2021	Dec. 31, 2020	Apr. 22, 2020
Restricted Cash And Cash Equivalents Items [Line Items]
Restricted cash	$ 40,000	$ 699,000	$ 40,000	$ 699,000
Inventory, net	6,094,000		6,094,000			$ 6,013,000
Inventory reserves	1,300,000		1,300,000			900,000
Amortization expense	400,000	$ 300,000	$ 1,164,000	$ 259,000
Promissory note							$ 2,300,000
Debt instrument, interest rate							1.00%
Unforgiven portion interest and principle payments end date			Apr. 22, 2022
Subsequent Event
Restricted Cash And Cash Equivalents Items [Line Items]
Forgiveness percentage					100.00%
Tetraphase Pharmaceuticals, Inc. | Fair Value Step-Up Adjustment to Inventory
Restricted Cash And Cash Equivalents Items [Line Items]
Inventory, net	0		$ 0			900,000
Credit Card
Restricted Cash And Cash Equivalents Items [Line Items]
Restricted cash	$ 40,000		$ 40,000			$ 40,000