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Note 3 - Investments

3 Months Ended

Mar. 31, 2022

Investments and Other Noncurrent Assets [Text Block]

Note 3 — Investments

The following tables summarize the fair value of the Company’s investments by type. The estimated fair values of the Company’s fixed income investments are classified as Level 2 in the fair value hierarchy as defined in U.S. GAAP. These valuations are based on observable direct and indirect inputs, primarily quoted prices of similar, but not identical, instruments in active markets or quoted prices for identical or similar instruments in markets that are not active. These fair values are obtained from independent pricing services which utilize Level 2 inputs.

	March 31, 2022
					Gross		Gross
	*Amortized*		*Accrued*		*Unrealized*		*Unrealized*			*Estimated*
	*Cost*		*Interest*		*Gains*		*Losses*			*Fair Value*
Obligations of U.S. Government and its agencies	$	42,005	$	98	$	1	$	(42	)	$	42,062
Corporate debt securities		4,272		19		—		(32	)		4,259
Certificates of deposit		1,648		3		—		(8	)		1,643
Total investments	$	47,925	$	120	$	1	$	(82	)	$	47,964

	December 31, 2021
					Gross		Gross
	*Amortized*		*Accrued*		*Unrealized*		*Unrealized*			*Estimated*
	*Cost*		*Interest*		*Gains*		*Losses*			*Fair Value*
Obligations of U.S. Government and its agencies	$	4,043	$	17	$	—	$	(7	)	$	4,053
Corporate debt securities		4,294		40		—		(5	)		4,329
Certificates of deposit		1,652		8		—		(1	)		1,659
Total investments	$	9,989	$	65	$	—	$	(13	)	$	10,041

The following table summarizes the scheduled maturity for the Company’s investments at March 31, 2022 and December 31, 2021:

	March 31, 2022		December 31, 2021
Maturing in one year or less	$	47,964	$	3,212
Maturing after one year through two years		—		6,829
Total investments	$	47,964	$	10,041