Other Current Assets and Other Long-Term Assets

12 Months Ended

Dec. 31, 2021

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Other Current Assets and Other Long-Term Assets

Other current assets consisted of the following (in thousands):

	December 31,
	2021		2020
Prepaid expenses	$	11,895	$	8,158
Deposits and other receivables	2,235		3,075
Interest receivables	2,513		2,304
	$	16,643	$	13,537

The other long-term assets balance of $19.0 million as of December 31, 2021 consisted of $18.4 million in deposits paid in connection with the Company’s research and development activities, and $0.6 million for a letter of credit secured by restricted cash in connection with the lease of the Company’s corporate headquarters. The other long-term assets balance of $9.2 million as of December 31, 2020 consisted of $8.6 million in deposits paid in conjunction with the Company’s research

and development activities, and $0.6 million for a letter of credit secured by restricted cash in connection with the lease of the Company’s corporate headquarters