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

3 Months Ended

Mar. 31, 2021

Notes Tables

Cash, Cash Equivalents and Investments [Table Text Block]

		*March 31, 2021 (Unaudited)*
									*Gross*				*Gross*
		*Level*							*Unrealized*				*Unrealized*
		*(1)*			*Fair Value*				*Holding Gains*				*Holding Losses*				*Adjusted Cost*
Cash and Cash Equivalents
Cash					$	1,217,419			$	—			$	—			$	1,217,419
Money Market Funds		1				11,838,139				—				—				11,838,139
Subtotal						13,055,558				—				—				13,055,558
Short-Term Investment Securities ⁽²⁾
Corporate Bonds ⁽³⁾		2				14,161,252				1,658				(17,847	)			14,177,441
Total					$	27,216,810			$	1,658			$	(17,847	)		$	27,232,999

		*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