Investments by security type consisted of the following at December 31, 2022 (in thousands):


	December 31, 2022
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Investments:
Commercial paper	$	2,465	$	—	$	—		$	2,465
Corporate bonds		2,958		—		(1	)		2,957
Government securities		12,898		3		(12	)		12,889
	$	18,321	$	3	$	(13	)	$	18,311

Investments with original maturities of less than 90 days are included in cash and cash equivalents on the condensed consolidated balance sheets and are not included in the table above. Investments with maturities of less than 12 months are considered current assets and those investments with maturities greater than 12 months are considered non-current assets. As of December 31, 2022, all of the Company’s investments were classified as available-for-sale and mature within 12 months of the balance sheet date.

Excluded from the tables above are restricted investments of $1,401 as the cost approximates current fair value as of June 30, 2023 and December 31, 2022, respectively. The Company did not hold any other investments as of June 30, 2023.