Cash and Cash Equivalents and Investments (Tables)

3 Months Ended

Mar. 31, 2023

Cash and Cash Equivalents and Investments

Schedule of short term-investments

			Estimated		Carrying
March 31, 2023	Cost		Fair Value		Value
		(in thousands)
Short-term investments:
Trading securities	$	59	$	12	$	12
Total trading securities		59		12		12
Total short-term investments	$	59	$	12	$	12
December 31, 2022
Short-term investments:
Trading securities	$	59	$	20	$	20
Total trading securities		59		20		20
Total short-term investments	$	59	$	20	$	20