Marketable Securities

12 Months Ended

Dec. 31, 2018

8. Marketable Securities

All marketable securities were classified as held-to-maturity as of the dates presented and the carrying amounts of held-to-maturity securities were as follows (in thousands):

December 31,	2018		2017
U.S. Government and agency obligations	$	24,996	$	17,910
Commercial paper		—		49,865
Corporate bonds		5,006		—
Total short-term marketable securities		30,002		67,775
U.S. Government and agency obligations		36,098		59,993
Corporate bonds		—		5,022
Total long-term marketable securities		36,098		65,015
Total marketable securities	$	66,100	$	132,790

Scheduled maturities of held-to-maturity investments were as follows (in thousands):

December 31,	2018
Due within one year	$	30,002
Due in one to five years		36,098
Total	$	66,100