Note 9 - Stock-Based Compensation - Summary of Stock Options (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Jan. 01, 2025
Options, Aggregate Intrinsic Value	$ 0	$ 0		$ 0
Granted (in shares)	0	0
Granted (in dollars per share)		$ 0
Exercised (in shares)		0
Exercised (in dollars per share)		$ 0
Canceled and expired (in dollars per share)		$ 0
Share-Based Payment Arrangement, Option [Member]
Balance, Outstanding (in shares)		1,175
Options, Outstanding, Weighted Average Exercise Price (in dollars per share)		$ 5.16
Options, Outstanding, Weighted Average Remaining Contractual Life (Year)		2 years 8 months 1 day	3 years 1 month 28 days
Balance, Outstanding (in shares)	1,175	1,175	1,175
Options, Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 5.16	$ 5.16	$ 5.16
Options exercisable (in shares)	1,175	1,175
Options exercisable, Weighted Average Exercise Price (in dollars per share)	$ 5.16	$ 5.16

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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