Note 6 - Stockholders' Equity (Details Textual) $ / shares in Units, $ in Millions			1 Months Ended		9 Months Ended
	Sep. 10, 2025 USD ($) $ / shares shares	Apr. 02, 2025 $ / shares shares	Oct. 31, 2025 USD ($) $ / shares shares	Sep. 30, 2025 $ / shares shares	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 07, 2025 $ / shares	Dec. 31, 2024 $ / shares
Common Stock, Par or Stated Value Per Share		$ 0.001		$ 0.001	$ 0.001	$ 0.001	$ 0.001
September 2025 Prefunded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) \| shares	5,845,455
Class of Warrant or Right, Issued During Period, Price Per Warrant	$ 0.549
Pre-funded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) \| shares		4,999,316
Class of Warrant or Right, Issued During Period, Price Per Warrant		$ 0.585		0.549
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 0.001	$ 0.001		$ 0.001	$ 0.001
Prefund Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) \| shares				5,845,455	5,845,455
Prefund Warrants [Member] \| Subsequent Event [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) \| shares			1,706,484
Class of Warrant or Right, Issued During Period, Price Per Warrant			$ 0.585
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 0.001
September 2025 Private Placement, First Closing [Member]
Stock Issued During Period, Shares, New Issues \| shares	25,036,360
Shares Issued, Price Per Share	$ 0.55
Proceeds from Issuance or Sale of Equity \| $	$ 17.0
September 2025 Purchasers [Member] \| Scenario, Plan [Member]
Proceeds from Issuance or Sale of Equity \| $	$ 12.0
September 2025 Private Placement, Second Closing [Member] \| Scenario, Plan [Member]
Private Placement, Covenant to Trigger Sale, Share Price	$ 0.6875
March 2025 Private Placement, First Closing [Member]
Stock Issued During Period, Shares, New Issues \| shares		3,405,118
Shares Issued, Price Per Share		$ 0.586
Proceeds from Issuance or Sale of Equity \| $					$ 4.9
March 2025 Private Placement, Second Closing [Member]
Private Placement, Covenant to Trigger Sale, Patients Enrolled				17	17
March 2025 Private Placement, Second Closing [Member] \| Subsequent Event [Member] \| Maximum [Member]
Proceeds from Issuance or Sale of Equity \| $			$ 4.1
March 2025 Private Placement, Second and Third Closing [Member]
Private Placement, Covenant to Trigger Sale, Share Price				$ 0.7325	$ 0.7325
March 2025 Private Placement, Second and Third Closing [Member] \| Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues \| shares			1,023,890
Shares Issued, Price Per Share			$ 0.586
Proceeds from Issuance or Sale of Equity \| $			$ 1.6
March 2025 Private Placement Third Closing [Member] \| Subsequent Event [Member] \| Maximum [Member]
Proceeds from Issuance or Sale of Equity \| $			$ 4.1

TALPHERA, INC. 10-Q