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Note 2 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Property, Plant and Equipment [Table Text Block]

		Estimated Useful Lives			As of				As of
		(in years)			September 30, 2025				December 31, 2024
Laboratory and manufacturing equipment		3 - 10			$	20,888,337			$	21,234,259
Buildings and improvements		10 - 39				20,960,522				20,889,395
Office furniture and equipment		3 - 10				928,550				1,056,145
Construction in progress		n/a				2,645,564				2,693,904
Land		n/a				516,867				516,867
Property, plant and equipment, gross						45,939,840				46,390,570
Accumulated depreciation						(21,599,100	)			(21,041,551	)
Property, plant and equipment, net					$	24,340,740			$	25,349,019

Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]

		As of September 30, 2025
		Level 1				Level 2				Level 3				Total
Assets:
Cash and money market accounts		$	3,886,198			$	—			$	—			$	3,886,198
Liabilities:
Bank debt		$	—			$	8,742,993			$	—			$	8,742,993

		As of December 31, 2024
		Level 1				Level 2				Level 3				Total
Assets:
Cash and money market accounts		$	3,758,232			$	—			$	—			$	3,758,232
Liabilities:
Bank debt		$	—			$	9,465,500			$	—			$	9,465,500

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

		During the Three-Month								During the Nine-Month
		Periods Ended September 30,								Periods Ended September 30,
		2025				2024				2025				2024
Company A			41	%			43	%			46	%			44	%
Company B			26	%			31	%			27	%			33	%
Total			68	%			74	%			73	%			77	%

		As of				As of
		September 30, 2025				December 31, 2024
Company A			45	%			57	%
Company B			23	%			21	%
Total			68	%			78	%

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

		During the Three-Month								During the Nine-Month
		Periods Ended September 30,								Periods Ended September 30,
		2025				2024				2025				2024
Net (loss) income attributable to stockholders		$	(139,748	)		$	(701,690	)		$	1,809,115			$	(2,671,184	)
Weighted average common shares outstanding - Basic			9,045,851				8,164,423				9,019,484				7,908,425
Dilutive impact of share-based compensation awards			—				—				—				—
Weighted average common shares outstanding - Diluted			9,045,851				8,164,423				9,019,484				7,908,425
Net (loss) income per share:
Basic		$	(0.02	)		$	(0.09	)		$	0.20			$	(0.34	)
Diluted		$	(0.02	)		$	(0.09	)		$	0.20			$	(0.34	)

Re-Tain Assets [Member]

Notes Tables

Property, Plant and Equipment [Table Text Block]

		Re-Tain® Assets as of
		September 30, 2025
Land		$	448,201
Buildings and improvements			12,725,789
Laboratory and manufacturing equipment			9,744,390
Construction in progress			2,316,951
Total			25,235,331
Accumulated depreciation			(9,775,788	)
Net book value		$	15,459,543

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