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

9 Months Ended

Sep. 30, 2021

Notes Tables

Cash, Cash Equivalents and Investments [Table Text Block]

		*September 30, 2021 (Unaudited)*
									*Gross*				*Gross*
		*Level*							*Unrealized*				*Unrealized*
		*(1)*			*Fair Value*				*Holding Gains*				*Holding Losses*				*Adjusted Cost*
Cash and Cash Equivalents
Cash					$	1,486,993			$	—			$	—			$	1,486,993
Money Market Funds		1				12,173,618				—				—				12,173,618
Subtotal						13,660,611				—				—				13,660,611
Short-Term Investment Securities ⁽²⁾
Corporate Bonds ⁽³⁾		2				9,079,410				—				(7,789	)			9,087,199
Total					$	22,740,021			$	—			$	(7,789	)		$	22,747,810

		*December 31, 2020 (Audited)*
									*Gross*				*Gross*
		*Level*							*Unrealized*				*Unrealized*
		*(1)*			*Fair Value*				*Holding Gains*				*Holding Losses*				*Adjusted Cost*
Cash and Cash Equivalents
Cash					$	149,015			$	—			$	—			$	149,015
Money Market Funds		1				20,488,030				—				—				20,488,030
Subtotal						20,637,045				—				—				20,637,045
Short-Term Investment Securities ⁽²⁾
Corporate Bonds ⁽³⁾		2				8,473,461				22,473				(6,463	)			8,457,451
Total					$	29,110,506			$	22,473			$	(6,463	)		$	29,094,496