Cash and Cash Equivalents and Short-Term Investments (Tables)

3 Months Ended

Mar. 31, 2022

Cash and Cash Equivalents and Short-Term Investments

Schedule of short term-investments

			Estimated		Carrying
March 31, 2022	Cost		Fair Value		Value
		(in thousands)
Investments:
Short-term:
Trading securities	$	59	$	91	$	91
Total trading securities		59		91		91
Total short term	$	59	$	91	$	91
December 31, 2021
Investments:
Short-term:
Trading securities	$	59	$	67	$	67
Total trading securities		59		67		67
Total short term	$	59	$	67	$	67