Note 11 - Stockholders' Equity, Stock Options and Warrants - Summary of Transactions for Stock Options and Warrants (Details)	9 Months Ended
	Sep. 30, 2024 $ / shares shares
Number of Shares Outstanding (in shares)	1,806,589
Average Exercise Price Outstanding (in dollars per share) | $ / shares	$ 21.52
Number of Shares Issued (in shares)	1,983,302
Average Exercise Price Issued (in dollars per share) | $ / shares	$ 1.09
Number of Shares Forfeited (in shares)	0
Expired, warrants (in shares)	(81,346)
Average Exercise Price Expired (in dollars per share) | $ / shares	$ 37.9
Exercised, warrants (in shares)	(958,117)
Average exercise price exercised (in dollars per share) | $ / shares	$ 1.32
Number of Shares Outstanding (in shares)	2,750,428
Average Exercise Price Outstanding (in dollars per share) | $ / shares	$ 8.92
Share-Based Payment Arrangement, Option [Member]
Number of Shares Outstanding (in shares)	47,664
Average Exercise Price Outstanding (in dollars per share) | $ / shares	$ 82.23
Number of Shares Issued (in shares)	0
Average Exercise Price Issued (in dollars per share) | $ / shares	$ 0
Number of Shares Forfeited (in shares)	(309)
Average Exercise Price Forfeited (in dollars per share) | $ / shares	$ 5.04
Expired, options (in shares)	(2,164)
Expired, options, average exercise price (in dollars per share) | $ / shares	$ 3.03
Exercised, options (in shares)	0
Exercised, options, average exercise price (in dollars per share) | $ / shares	$ 0
Number of Shares Outstanding (in shares)	45,191
Average Exercise Price Outstanding (in dollars per share) | $ / shares	$ 86.55