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Prepaid Expenses and Other Current Assets
 6 Months Ended
Jun. 30, 2021
Prepaid Expense And Other Assets Current [Abstract]  
Prepaid Expenses and Other Current Assets

4.

PREPAID EXPENSES AND OTHER CURRENT ASSETS

Prepaids and other current assets consisted of the following as of December 31, 2020 and June 30, 2021:

 

 

 

December 31,

2020

 

 

June 30,

2021

 

 

 

(in thousands)

 

Prepaid inventory

 

$

4,361

 

 

$

5,319

 

Restricted cash

 

 

3,250

 

 

 

2,000

 

Prepaid insurance

 

 

1,504

 

 

 

2,507

 

Other

 

 

1,996

 

 

 

2,890

 

Prepaid and other current assets

 

$

11,111

 

 

$

12,716