Note 9 - Stockholders' Equity and Common Stock Warrants - Warrants Outstanding to Acquire Shares of Its Common Stock (Details) - $ / shares	Jun. 30, 2026	Jun. 11, 2026
Historical EIP common stock warrants (in shares)	11,039,520
Historical EIP Common Stock Warrants [Member]
Historical EIP common stock warrants (in shares)	43,618
Historical EIP common stock warrants (in dollars per share)	$ 19.81
Historical EIP common stock warrants	Apr. 30, 2028
2026 Pre-funded Warrants [Member]
Historical EIP common stock warrants (in shares)	1,592,863
Historical EIP common stock warrants (in dollars per share)	$ 0.001	$ 3.139
Series A Warrant [Member]
Historical EIP common stock warrants (in shares)	2,532,285
Historical EIP common stock warrants (in dollars per share)	$ 39.24
Historical EIP common stock warrants	Apr. 30, 2027
Series B Warrants [Member]
Historical EIP common stock warrants (in shares)	3,360,377
Historical EIP common stock warrants (in dollars per share)	$ 3.32
Historical EIP common stock warrants	Jun. 30, 2031
Series C Warrants [Member]
Historical EIP common stock warrants (in shares)	3,360,377
Historical EIP common stock warrants (in dollars per share)	$ 3.14
Historical EIP common stock warrants	Jun. 30, 2027
Placement Agent Warrant [Member]
Historical EIP common stock warrants (in shares)	150,000
Historical EIP common stock warrants (in dollars per share)	$ 5
Historical EIP common stock warrants	Jun. 30, 2031