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

6 Months Ended

Jun. 30, 2021

Notes Tables

Cash, Cash Equivalents and Investments [Table Text Block]

		*June 30, 2021 (Unaudited)*
										*Gross*				*Gross*
		*Level*								*Unrealized*				*Unrealized*
		*(1)*				*Fair Value*				*Holding Gains*				*Holding Losses*				*Adjusted Cost*
Cash and Cash Equivalents
Cash						$	820,985			$	—			$	—			$	820,985
Money Market Funds			1				13,197,841				—				—				13,197,841
Subtotal							14,018,826				—				—				14,018,826
Short-Term Investment Securities ⁽²⁾
Corporate Bonds ⁽³⁾			2				11,570,334				—				(11,577	)			11,581,911
Total						$	25,589,160			$	—			$	(11,577	)		$	25,600,737

		*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