Short-term Investments - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended	6 Months Ended
	Jan. 31, 2022	Jun. 30, 2022	Jun. 30, 2022
Short Term Investments [Line Items]
Gain on sale of non controlling equity interest			$ 699,000
Short-term investments		$ 323,000	323,000
La Jolla | AcelRx
Short Term Investments [Line Items]
Non-controlling equity interest, ownership percentage	15.00%
Investment measured at contributed cost	$ 0
Business acquisition, common stock issued value	1,400,000		1,400,000
Contingent value rights to be paid upon the achievement of certain regulatory and sales-based milestones	3,900,000
Contingent value rights to be paid upon satisfaction of certain obligations	200,000
Short-term investments		300,000	300,000
Fair value of securities sold not yet purchased		300,000	300,000
La Jolla | AcelRx | Other Income (Expense), Net
Short Term Investments [Line Items]
Gain on sale of non controlling equity interest	700,000
Short-term investments	$ 700,000
Loss on short term investments		100,000	400,000
Loss on securities sold not yet purchased		$ (30,000)	$ (30,000)