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

9 Months Ended

Sep. 30, 2023

Notes Tables

Cash, Cash Equivalents and Investments [Table Text Block]

		*September 30, 2023 (Unaudited)*
										*Allowance*				*Gross*				*Gross*
		*Level*								*for*				*Unrealized*				*Unrealized*
		*(1)*				*Fair Value*				*Credit Losses*				*Holding Gains*				*Holding Losses*				*Adjusted Cost*
Cash and Cash Equivalents
Cash						$	434,388			$	—			$	—			$	—			$	434,388
Money Market Funds ⁽²⁾			1				6,968,788				—				—				—				6,968,788
Subtotal							7,403,176				—				—				—				7,403,176
Short-Term Investment Securities ⁽³⁾
Corporate Bonds ⁽⁴⁾⁽⁵⁾			2				772,483				—				—				321				772,804
Total						$	8,175,659			$	—			$	—			$	321			$	8,175,980

		*December 31, 2022 (Audited)*
									*Allowance*				*Gross*				*Gross*
		*Level*							*for*				*Unrealized*				*Unrealized*
		*(1)*			*Fair Value*				*Credit Losses*				*Holding Gains*				*Holding Losses*				*Adjusted Cost*
Cash and Cash Equivalents
Cash					$	26,782			$	—			$	—			$	—			$	26,782
Money Market Funds ⁽²⁾		1				5,767,490				—				—				—				5,767,490
Subtotal						5,794,272				—				—				—				5,794,272
Short-Term Investment Securities⁽³⁾
Corporate Bonds ⁽⁴⁾⁽⁵⁾		2				6,800,062				—				—				(47,208	)			6,847,270
Total					$	12,594,334			$	—			$	—			$	(47,208	)		$	12,641,542