Note 20 - Stock Options - Summary of 2017 Employee Plan Options Activities (Details) - USD ($)	6 Months Ended		12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Employee Stock Option Plan 2017 [Member]
Outstanding. options (in shares)	270,750	216,375	216,375
Outstanding, weighted average exercise price (in dollars per share)	$ 5.35	$ 4.89	$ 4.89
Outstanding, weighted average remaining contractual term (Year)	3 years 1 month 17 days	3 years 6 months 3 days	3 years 5 months 4 days	2 years 11 months 1 day
Aggregate intrinsic value outstanding	$ 204	$ 39	$ 268	$ 140
Granted, options (in shares)	40,000	48,000
Granted, weighted average exercise price (in dollars per share)	$ 6.17	$ 4.88
Exercised, options (in shares)	0	(63,875)
Exercised, weighted average exercise price (in dollars per share)	$ 0	$ 3.12
Forfeited or expired, options (in shares)	0	(3,500)
Outstanding, options (in shares)	310,750	197,000	270,750	216,375
Outstanding, weighted average exercise price (in dollars per share)	$ 5.45	$ 5.48	$ 5.35	$ 4.89
Exercisable, options (in shares)	164,500	88,250
Exercisable, weighted average exercise price (in dollars per share)	$ 5.54	$ 5.59
Exercisable, weighted average remaining contractual term (Year)	2 years 7 months 2 days	3 years 29 days
Exercisable, aggregate intrinsic value	$ 107	$ 16
Exercised, options (in shares)	0	(63,875)
Director Plan 2017 [Member]
Outstanding. options (in shares)	431,000	420,000	420,000
Outstanding, weighted average exercise price (in dollars per share)	$ 5.24	$ 4.91	$ 4.91
Outstanding, weighted average remaining contractual term (Year)	2 years 4 months 17 days	2 years 4 months 28 days	2 years 10 months 17 days	2 years 10 months 28 days
Aggregate intrinsic value outstanding	$ 439	$ 352	$ 531	$ 309
Granted, options (in shares)	0	0
Granted, weighted average exercise price (in dollars per share)	$ 0	$ 0
Exercised, options (in shares)	0	0
Exercised, weighted average exercise price (in dollars per share)	$ 0
Forfeited or expired, options (in shares)	0
Outstanding, options (in shares)	431,000	420,000	431,000	420,000
Outstanding, weighted average exercise price (in dollars per share)	$ 5.24	$ 4.91	$ 5.24	$ 4.91
Exercisable, options (in shares)	431,000	420,000
Exercisable, weighted average exercise price (in dollars per share)	$ 5.24	$ 4.91
Exercisable, weighted average remaining contractual term (Year)	2 years 4 months 17 days	2 years 4 months 28 days
Exercisable, aggregate intrinsic value	$ 439	$ 352
Exercised, options (in shares)	0	0