Note 6 - Stockholders' Equity (Details Textual) - USD ($)			3 Months Ended				9 Months Ended
	Sep. 22, 2025	Jul. 07, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Mar. 03, 2025	Jan. 31, 2025	Dec. 31, 2024	May 02, 2024	Mar. 19, 2024	Dec. 20, 2021
Share Repurchase Program, Authorized, Amount									$ 5,000,000
Treasury Stock, Shares, Acquired (in shares)			145,061				2,600,763
Treasury Stock, Value, Acquired, Cost Method			$ 141,000	$ 2,565,000			$ 2,705,550
Treasury Stock Acquired, Transaction Fees							52,015
Payments for Repurchase of Common Stock							2,706,000	$ (0)
Share Repurchase Program, Remaining Authorized, Amount			$ 2,294,450				$ 2,294,450
Stock Issued During Period, Shares, New Issues (in shares)							2,556,927
Common Stock, Par or Stated Value Per Share (in dollars per share)			$ 0.0001				$ 0.0001				$ 0.0001
Proceeds from Issuance of Common Stock							$ 11,143,000	33,119,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)			717,941				717,941			717,941				353,163
Share-Based Compensation Arrangement by Share-Based Payment Award, Annual Percentage Increase										5.00%				5.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)			85,051				85,051
Private Placement [Member]
Stock Issued During Period, Shares, New Issues (in shares)	1,562,500
Shares Issued, Price Per Share (in dollars per share)	$ 1.6
Proceeds from Issuance or Sale of Equity	$ 2,500,000
Payments of Stock Issuance Costs	$ 50,000.00
Private Placement [Member] | Pre-funded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)	1
Class of Warrant or Right, Offering Price (in dollars per share)	$ 1.6
A T M Facility [Member]
Stock Issued During Period, Shares, New Issues (in shares)			0		9,719,173	1,493,878
Common Stock, Par or Stated Value Per Share (in dollars per share)													$ 0.0001
Equity Issuance, Maximum Aggregate Sales Price													$ 50,000,000
Commission Fee, Percentage												3.00%
Proceeds from Issuance of Common Stock			$ 0			$ 5,400,000	$ 9,700,000	33,100,000
Restricted Stock [Member]
Stock Issued During Period, Shares, Issued for Services (in shares)		49,505					102,873
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount			410,000				$ 410,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)							1 year 3 months 18 days
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount			11,915				$ 11,915
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)							3 months 18 days
Exact Value [Member]
Treasury Stock, Value, Acquired, Cost Method			$ 140,038
Payments for Repurchase of Common Stock							$ 2,705,550	$ 0