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

12 Months Ended

Dec. 31, 2022

Cash and Cash Equivalents and Short-Term Investments

Schedule of short term-investments

			Estimated		Carrying
December 31, 2022	Cost		Fair Value		Value
		(in thousands)
Short-term investments:
Trading securities	$	59	$	20	$	20
Total trading securities		59		20		20
Total short-term investments	$	59	$	20	$	20
December 31, 2021
Short-term investments:
Trading securities	$	59	$	67	$	67
Total trading securities		59		67		67
Total short-term investments	$	59	$	67	$	67