Note 3 - Investments

12 Months Ended

Dec. 31, 2021

Notes to Financial Statements

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.

	December 31, 2021
	Amortized Cost		Accrued Interest		Gross Unrealized Gains		Gross Unrealized Losses			Estimated 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

	December 31, 2020
	Amortized Cost		Accrued Interest		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Obligations of U.S. Government and its agencies	$	24,986	$	14	$	3	$	(3	)	$	25,000
Certificates of deposit		3,225		11		3		−			3,239
Total Investments	$	28,211	$	25	$	6	$	(3	)	$	28,239

The following table summarizes the scheduled maturity for the Company’s investments at December 31, 2021 and 2020.

	2021		2020
Maturing in one year or less	$	3,212	$	28,239
Maturing after one year through two years		6,829		−
Total investments	$	10,041	$	28,239