Investments (Tables)

6 Months Ended

Jun. 30, 2022

Disclosure Text Block Supplement [Abstract]

Schedule of amortized cost and gross unrealized losses on all securities

	Amortized cost		Gross unrealized gains		Gross unrealized losses		Fair value
	(in thousands)
Short-term investments:
U.S. Treasury securities	$	14,768	$	-	$	-	$	14,768
Marketable securities		1,055		11		-		1,066
Total short-term investments		15,823		11		-		15,834

	Amortized cost		Gross unrealized gains		Gross unrealized losses		Fair value
	(in thousands)
Short-term investments:
U.S. Treasury securities	$	14,751	$	-	$	-	$	14,751
Total short-term investments		14,751		-		-		14,751

Schedule of financial assets measured at fair value on a recurring basis

	Level 1		Level 2		Level 3		Total
	(in thousands)
Cash equivalents:
Money market funds	$	3,088	$	-	$	-	$	3,088
Investments:
Available-for-sale securities — current:
U.S. Treasury securities		-		14,768		-		14,768
Marketable securities		1,066		-		-		1,066
Total	$	4,154	$	14,768	$	-	$	18,922

	Level 1		Level 2		Level 3		Total
	(in thousands)
Cash equivalents:
Money market funds	$	3,137	$	-	$	-	$	3,137
Investments:
Available-for-sale securities — current:
U.S. Treasury securities		-		14,751		-		14,751
Total	$	3,137	$	14,751	$	-	$	17,888