Short-term Investments - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended
	Jan. 31, 2022	Mar. 31, 2022
Short Term Investments [Line Items]
Gain on sale of non controlling equity interest		$ 699,000
Short-term investments		390,000
AcelRx | La Jolla
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
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		400,000
AcelRx | La Jolla | 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		$ 300,000