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

3 Months Ended

Mar. 31, 2021

Cash and Cash Equivalents and Short-Term Investments

Schedule of short term-investments

			Estimated		Carrying
March 31, 2021	Cost		Fair Value		Value
		(inthousands)
Investments:
Short-term:
Trading securities	$	59	$	131	$	131
Total trading securities		59		131		131
Total short term	$	59	$	131	$	131
December 31, 2020
Investments:
Short-term:
Trading securities	$	59	$	79	$	79
Total trading securities		59		79		79
Total short term	$	59	$	79	$	79