Note 6 - Stockholders' Equity (Details Textual) $ / shares in Units, $ in Millions			6 Months Ended
	Apr. 02, 2025 $ / shares shares	Mar. 31, 2025 USD ($) $ / shares shares	Jun. 30, 2025 USD ($) $ / shares	Dec. 31, 2024 $ / shares
Common Stock, Par or Stated Value Per Share (in dollars per share)		$ 0.001	$ 0.001	$ 0.001
March 2025 Private Placement, First Closing [Member]
Stock Issued During Period, Shares, New Issues (in shares) \| shares	3,405,118
Shares Issued, Price Per Share (in dollars 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
March 2025 Private Placement Third Closing [Member]
Private Placement, Covenant to Trigger Sale, Patients Enrolled		35
March 2025 Private Placement, Second and Third Closing [Member]
Stock Issued During Period, Shares, New Issues (in shares) \| shares		3,405,118
Shares Issued, Price Per Share (in dollars per share)		$ 0.586
Private Placement, Covenant to Trigger Sale, Share Price (in dollars per share)		$ 0.7325
Private Placement, Expected Proceeds \| $		$ 4.9	$ 9.8
Pre-funded Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	0.001	$ 0.001
Class of Warrant or Right, Issued During Period, Price Per Warrant (in dollars per share)	$ 0.585
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) \| shares	4,999,316
March 2025 Prefunded Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 0.001
Class of Warrant or Right, Issued During Period, Price Per Warrant (in dollars per share)	$ 0.585
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) \| shares	4,999,316
March 2025 Prefunded Warrants, Second and Third Closing [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		0.001
Class of Warrant or Right, Issued During Period, Price Per Warrant (in dollars per share)		$ 0.585
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) \| shares		4,999,316

TALPHERA, INC. 10-Q