Note 15 - Common Stock Warrants - Summary of Outstanding Warrants (Details) - $ / shares	Mar. 31, 2026	Feb. 28, 2026
Number of warrant shares (in shares)	8,950,562
Warrants Expiring July 1, 2026 [Member]
Number of warrant shares (in shares)	30
Exercise price of warrants (in dollars per share)	$ 1,768
Expiration date of warrants	Jul. 01, 2026
Warrants Expiring November 15, 2026 [Member]
Number of warrant shares (in shares)	30
Exercise price of warrants (in dollars per share)	$ 1,768
Expiration date of warrants	Nov. 15, 2026
Warrants Expiring November 10, 2026 [Member]
Number of warrant shares (in shares)	102
Exercise price of warrants (in dollars per share)	$ 10,625
Expiration date of warrants	Nov. 10, 2026
Warrants Expiring August 9, 2027 [Member]
Number of warrant shares (in shares)	589
Exercise price of warrants (in dollars per share)	$ 531.25
Expiration date of warrants	Aug. 09, 2027
Warrants Expiring July 10, 2028 [Member]
Number of warrant shares (in shares)	765
Exercise price of warrants (in dollars per share)	$ 112.2
Expiration date of warrants	Jul. 10, 2028
Warrants Expiring July 14, 2028 [Member]
Number of warrant shares (in shares)	1,206
Exercise price of warrants (in dollars per share)	$ 81.6
Expiration date of warrants	Jul. 14, 2028
Warrants Expiring August 4, 2028 [Member]
Number of warrant shares (in shares)	781
Exercise price of warrants (in dollars per share)	$ 83.64
Expiration date of warrants	Aug. 04, 2028
Warrants Expiring May 9, 2029 [Member]
Number of warrant shares (in shares)	11,083
Exercise price of warrants (in dollars per share)	$ 15.9
Expiration date of warrants	May 09, 2029
Warrants Expiring May 14, 2029 [Member]
Number of warrant shares (in shares)	415,589
Exercise price of warrants (in dollars per share)	$ 14.45
Expiration date of warrants	May 14, 2029
Warrants Expiring June 25, 2030 [Member]
Number of warrant shares (in shares)	61,287
Exercise price of warrants (in dollars per share)	$ 3.04
Expiration date of warrants	Jun. 25, 2030
Warrants Expiring June 25, 2029 [Member]
Number of warrant shares (in shares)	10,000
Exercise price of warrants (in dollars per share)	$ 4.2
Expiration date of warrants	Jun. 25, 2029
Warrants Expiring July 31, 2030 [Member]
Number of warrant shares (in shares)	64,065
Exercise price of warrants (in dollars per share)	$ 3.04
Expiration date of warrants	Jul. 31, 2030
Warrants Expiring July 31, 2029 [Member]
Number of warrant shares (in shares)	11,068
Exercise price of warrants (in dollars per share)	$ 3.8
Expiration date of warrants	Jul. 31, 2029
Warrants Expiring August 11, 2029 [Member]
Number of warrant shares (in shares)	32,500
Exercise price of warrants (in dollars per share)	$ 3.64
Expiration date of warrants	Aug. 11, 2029
Warrants Expiring August 21, 2030 [Member]
Number of warrant shares (in shares)	188,842
Exercise price of warrants (in dollars per share)	$ 3.04
Expiration date of warrants	Aug. 21, 2030
Warrants Expiring August 21, 2029 [Member]
Number of warrant shares (in shares)	29,830
Exercise price of warrants (in dollars per share)	$ 3.52
Expiration date of warrants	Aug. 21, 2029
Warrants Expiring September 26, 2030 [Member]
Number of warrant shares (in shares)	195,793
Exercise price of warrants (in dollars per share)	$ 3.04
Expiration date of warrants	Sep. 26, 2029
Warrants Expiring September 26, 2029 [Member]
Number of warrant shares (in shares)	32,249
Exercise price of warrants (in dollars per share)	$ 3.26
Expiration date of warrants	Sep. 26, 2029
Warrants Expiring December 10, 2030 1 [Member]
Number of warrant shares (in shares)	2,904,528
Exercise price of warrants (in dollars per share)	$ 2.231
Expiration date of warrants	Dec. 10, 2030
Warrants Expiring December 10, 2030 2 [Member]
Number of warrant shares (in shares)	4,553,213
Exercise price of warrants (in dollars per share)	$ 2.231
Expiration date of warrants	Dec. 10, 2030
Prefunded Warrants [Member]
Number of warrant shares (in shares)	437,012
Exercise price of warrants (in dollars per share)	$ 0.0001	$ 0.0001