Note 16 - Equity Incentive Plans (Details Textual) - USD ($)				3 Months Ended		6 Months Ended
	Jan. 01, 2026	Jan. 01, 2025	Jan. 01, 2024	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	May 28, 2026	May 27, 2026	Dec. 31, 2025	Jun. 29, 2025	Aug. 09, 2024	Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)				356,002		356,002				392,494
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in dollars per share)				$ 6.13		$ 6.13
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in dollars per share)				$ 22.63		$ 22.63
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted-Average Remaining Contractual Term (Year)						8 years 4 months 17 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted-Average Remaining Contractual Term (Year)						4 years 14 days
Share-Based Payment Arrangement, Expense				$ 133,000	$ 177,000	$ 341,000	$ 277,000
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)						4 years
Share-Based Payment Arrangement, Expense				63,000	$ 57,000	$ 206,000	131,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount				$ 576,000		$ 576,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)						3 years 1 month 28 days
Restricted Stock [Member]
Share-Based Payment Arrangement, Expense							$ 2
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number (in shares)				0	0	0	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)							111
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Expense				$ 70,000	$ 33,000	$ 135,000	$ 57,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount				203,000		$ 203,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)						2 years 7 months 13 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)						76,621
Share-based Payment Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Total Fair Value				$ 50,000	$ 306,000	$ 50,000	$ 306,000
Share-Based Payment Arrangement, Employee [Member]
Ownership of Stock, Option Grants				10.00%		10.00%
Share-based Compensation Arrangement by Share-based Payment Award, Exercise Price, Percent of Market Value per Share				100.00%		100.00%
Parent or Subsidiary of Company [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Exercise Price, Percent of Market Value per Share				110.00%		110.00%
The 2021 Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares)			4,312
Share-based Payment Arrangement by Share-based Payment Award, Number of Additional Shares Authorized, Percentage of Shares Outstanding													5.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)													5,434
A&R 2021 Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares)	126,289	27,846
Share-based Payment Arrangement by Share-based Payment Award, Number of Additional Shares Authorized, Percentage of Shares Outstanding	5.00%									5.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)					511,669		511,669	3,219,566	637,958		86,669	58,823
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)				2,774,278		2,774,278
Ownership of Stock, Option Grants				10.00%		10.00%