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Prepaid Expenses and Other Current Assets and Accrued and Other Current Liabilities
 12 Months Ended
Dec. 31, 2021
Other Current Assets And Other Current Liabilities [Abstract]  
Prepaid Expenses and Other Current Assets and Accrued and Other Current Liabilities Prepaid Expenses and Other Current Assets and Accrued and Other Current Liabilities
Prepaid expenses and other current assets as of December 31, 2021 and 2020 consisted of the following:
December 31,
20212020
Prepaid expenses$2,256 $2,268 
Restricted cash1,180 238 
Other current assets574 998 
Prepaid expenses and other current assets$4,010 $3,504 

Accrued and other current liabilities of December 31, 2021 and 2020 consisted of the following:
December 31,
20212020
Payroll and related costs$8,545 $7,247 
Accrued liabilities2,640 1,455 
Booking Commitment (see Note 12)
1,661 1,662 
Interest payable703 289 
Operating lease liabilities1,912 1,900 
Other accrued and other current liabilities897 1,422 
Accrued and other current liabilities$16,358 $13,975 
Prepaid Expenses and Other Current Assets and Accrued and Other Current Liabilities Prepaid Expenses and Other Current Assets and Accrued and Other Current Liabilities
Prepaid expenses and other current assets as of December 31, 2021 and 2020 consisted of the following:
December 31,
20212020
Prepaid expenses$2,256 $2,268 
Restricted cash1,180 238 
Other current assets574 998 
Prepaid expenses and other current assets$4,010 $3,504 

Accrued and other current liabilities of December 31, 2021 and 2020 consisted of the following:
December 31,
20212020
Payroll and related costs$8,545 $7,247 
Accrued liabilities2,640 1,455 
Booking Commitment (see Note 12)
1,661 1,662 
Interest payable703 289 
Operating lease liabilities1,912 1,900 
Other accrued and other current liabilities897 1,422 
Accrued and other current liabilities$16,358 $13,975