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BALANCE SHEET DETAILS
 9 Months Ended
Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
BALANCE SHEET DETAILS BALANCE SHEETS DETAILS
Cash and Cash Equivalents
Cash and cash equivalents were as follow (in thousands):
September 30,
2022		December 31,
2021
Cash $15,567 $51,490 
Certificates of deposit (1)
15,794 — 
Money market funds5,406 — 
Cash and cash equivalents$36,767 $51,490 
(1) Represents certificates of deposit with initial or remaining maturity days of 90 days or less.

Investments - Current
Investments - current were as follows (in thousands):
September 30,
2022		December 31,
2021
Certificates of deposit (2)
$5,267 $— 
U.S. treasury securities 22,030 — 
Marketable securities69,482 86,431 
Short-term investments$96,779 $86,431 
(2) Represents investments with remaining maturity days between 91 days and one year.
Accounts and Other Receivables
Accounts and other receivables were as follows (in thousands):
 September 30,
2022		December 31,
2021
Trade accounts receivables$2,016 $1,235 
Other receivables1,327 735 
Accounts and other receivables$3,343 $1,970 
Allowance for credit losses as of September 30, 2022 and December 31, 2021 were not material.
Prepaid Expenses and Other Current Assets
Prepaid expenses and other current assets were as follows (in thousands):
September 30,
2022		December 31,
2021
Prepaid expenses$675 $798 
Contract assets - current6,913 12,448 
Other current assets143 186 
Prepaid expenses and other current assets$7,731 $13,432 
Investments - noncurrent
Investments- noncurrent are as follows (in thousands):
September 30,
2022		December 31,
2021
U.S. treasury securities$3,605 $— 
Marketable debt securities14,915 7,286 
Investments- noncurrent$18,520 $7,286 
Other Assets
Other assets are as follows (in thousands):
 September 30,
2022		December 31,
2021
Contract assets - long-term653 1,746 
Lease right-of-use assets507 912 
Deferred tax assets2,116 2,115 
Other assets 14 36 
Total other assets$3,290 $4,809 
Other Current Liabilities
Other current liabilities are as follows (in thousands):
 September 30,
2022		December 31,
2021
Derivative instruments$3,199 $6,267 
Lease liabilities - current715 1,098 
Other current liabilities3,815 3,882 
Total other current liabilities$7,729 $11,247