Note 4 - Equity - Restricted Stock Units Activity (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares	3 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024
Outstanding (in shares)	1,600	3,487	2,124	205	677	1,049
Outstanding (in dollars per share)	$ 22.05	$ 39.34	$ 362.71	$ 3,300	$ 2,799.97	$ 2,977.29
Restricted stock units granted (in shares)			1,600			0
Restricted stock units granted (in dollars per share)			$ 22.05			$ 0
Restricted stock units vested (in shares)		1,590	200		391	245
Restricted stock units vested (in dollars per share)		$ 54	$ 2,813.1		$ 2,434.22	$ 3,300
Restricted stock units forfeited or cancelled (in shares)	240	297	37	1	81	127
Restricted stock units forfeited or cancelled (in dollars per share)	$ 22.05	$ 54	$ 2,861.35	$ 3,300	$ 3,300	$ 3,300
Outstanding (in shares)	1,360	1,600	3,487	204	205	677
Outstanding (in dollars per share)	$ 22.05	$ 22.05	$ 39.34	$ 3,300	$ 3,300	$ 2,799.97