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BALANCE SHEET DETAILS
 12 Months Ended
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
BALANCE SHEET DETAILS BALANCE SHEETS DETAILS
Cash and Cash Equivalents
Our cash and cash equivalent balances were as follows (in thousands):
 December 31,
 20212020
Cash $51,490 $13,908 
Money market funds— 45,614 
Cash and cash equivalents$51,490 $59,522 
Accounts and Other Receivables
Accounts and other receivables were as follows (in thousands):
 December 31,
 20212020
Trade accounts receivables$1,235 $1,618 
Other receivables735 600 
Accounts and other receivables$1,970 $2,218 
Allowance for credit losses as of December 31, 2021 and 2020 were not material.

Prepaid Expenses and Other Current Assets
Prepaid expenses and other current assets were as follows (in thousands):
December 31,
20212020
Prepaid expenses$798 $816 
Contract assets - current12,448 11,623 
Other current assets186 171 
$13,432 $12,610 
Other Assets, Net
Other assets, net are as follows (in thousands):
 December 31,
 20212020
Contract assets - long-term$1,746 $4,596 
Lease right-of-use assets912 1,607 
Deferred tax assets2,115 2,659 
Marketable debt securities -non-current7,286 — 
Other assets 36 138 
Total other assets, net$12,095 $9,000 
Other Current Liabilities
Other current liabilities are as follows (in thousands):
 December 31,
 20212020
Derivative instruments$6,267 $— 
Lease liabilities - current1,098 1,382 
Other current liabilities3,882 1,075 
Total other current liabilities$11,247 $2,457