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Note 16 - Stock-based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended			9 Months Ended
	Mar. 31, 2025	Sep. 30, 2026	Jun. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Share-Based Payment Arrangement, Expense		$ 0.5		$ 0.6	$ 2.0	$ 1.4
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares)			600,000
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)					$ 25
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount		0.7			$ 0.7
Board of Directors Chairman [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares)			400,000
Non-employee Consultants [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares)			200,000
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)			$ 25
Non-employee Consultants [Member] \| Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)			100,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value (in dollars per share)			$ 20
Non-employee Consultants [Member] \| Share-Based Payment Arrangement, Tranche Two [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)			3 years
Non-employee Consultants [Member] \| Share-Based Payment Arrangement, Tranche Two [Member] \| Minimum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Option, Nonvested, Weighted Average Exercise Price (in dollars per share)			$ 20
Non-employee Consultants [Member] \| Share-Based Payment Arrangement, Tranche Two [Member] \| Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Option, Nonvested, Weighted Average Exercise Price (in dollars per share)			$ 30
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares)					14,568
Restricted Stock [Member] \| Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares)					14,568
Restricted Common Unit Awards [Member] \| Officer [Member] \| KPH RUA [Member]
Share-Based Payment Arrangement, Expense			$ (0.1)
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares)	199,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Forfeitures (in shares)			93,097
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense		$ 0.1			$ 1.2
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)			10 years