Balance Sheet Details - Additional Information (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Apr. 22, 2020
Restricted Cash And Cash Equivalents Items [Line Items]
Restricted cash	$ 40,000	$ 40,000	$ 606,000
Inventory, net	5,481,000	5,481,000		$ 6,013,000
Inventory reserves	1,200,000	1,200,000		900,000
Amortization expense	400,000	776,000	$ 0
Promissory note					$ 2,300,000
Debt instrument, interest rate					1.00%
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