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Other Current Assets and Other Long-Term Assets
 6 Months Ended
Jun. 30, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other Current Assets and Other Long-Term Assets Other Current Assets and Other Long-Term Assets

Other current assets consisted of the following (in thousands):
 
June 30,
 
December 31,
 
2020
 
2019
Prepaid expenses
$
5,043

 
$
5,672

Deposits and other receivables
1,471

 
2,119

Interest receivable
1,813

 
1,566

 
$
8,327

 
$
9,357



The other long-term assets balance as of June 30, 2020 consisted of $5.4 million in deposits paid in conjunction with the Company's research and development activities, $0.7 million for an operating right-of-use asset for the Company's corporate headquarters, and $0.6 million for a security deposit in connection with the lease of the Company's future corporate headquarters. As of December 31, 2019, the other long-term assets balance consisted of $5.1 million in deposits paid in conjunction with the Company's research and development activities, $0.6 million for an operating right-of-use asset for the Company's corporate headquarters, and $0.3 million for a security deposit in connection with the lease of the Company's future corporate headquarters.