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Note 2 - Cash, Cash Equivalents, and Investments (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

Cash, Cash Equivalents and Investments [Table Text Block]

		*March 31, 2022 (Unaudited)*
									*Gross*				*Gross*
		*Level*							*Unrealized*				*Unrealized*
		*(1)*			*Fair Value*				*Holding Gains*				*Holding Losses*				*Adjusted Cost*
Cash and Cash Equivalents
Cash					$	1,086,600			$	—			$	—			$	1,086,600
Money Market Funds		1				11,332,429				—				—				11,332,429
Subtotal						12,419,029				—				—				12,419,029
Short-Term Investment Securities ⁽²⁾
Corporate Bonds ⁽⁴⁾		2				3,009,300				—				(11,764	)			3,021,064
Long-Term Investment Securities ⁽³⁾
Corporate Bonds ⁽⁴⁾		2				1,992,120				—				(6,000	)			1,998,120
Total					$	17,420,449			$	—			$	(17,764	)		$	17,438,213

		*December 31, 2021 (Audited)*
									*Gross*				*Gross*
		*Level*							*Unrealized*				*Unrealized*
		*(1)*			*Fair Value*				*Holding Gains*				*Holding Losses*				*Adjusted Cost*
Cash and Cash Equivalents
Cash					$	1,377,094			$	—			$	—			$	1,377,094
Money Market Funds		1				14,371,386				—				—				14,371,386
Subtotal						15,748,480				—				—				15,748,480
Short-Term Investment Securities ⁽²⁾
Corporate Bonds ⁽⁴⁾		2				4,509,285				—				(2,495	)			4,511,780
Total					$	20,257,765			$	—			$	(2,495	)		$	20,260,260