Investments (Tables)

3 Months Ended

Mar. 31, 2022

Investments, Debt and Equity Securities [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	$	14,752	$	-	$	-	$	14,752
Marketable securities		1,054		7		-		1,061
Total short-term investments	$	15,806	$	7	$	-	$	15,813

	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	$	3,082	$	-	$	-	$	3,082
Investments:
Available-for-sale securities — current:
U.S. Treasury securities		-		14,752		-		14,752
Marketable securities		1,061						1,061
Total	$	4,143	$	14,752	$	-	$	18,895

	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