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Selected Balance Sheet Data
 3 Months Ended
Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Selected Balance Sheet Data Selected Balance Sheet Data
Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets as of March 31, 2023 and December 31, 2022 consisted of the following (in thousands):
March 31, 2023December 31, 2022
Prepaid inventories
$2,263 $2,372 
Prepaid expenses and other(1)
1,295 1,299 
Contract assets
1,132 290 
Financed insurance premiums
3,036 2,289 
Assets held for sale
750 1,850 
Total prepaid expenses and other current assets
$8,476 $8,100 
____________
(1) Primarily relates to prepaid insurance, licenses, subscriptions, contract assets and other receivables.

Other Current Liabilities
Other current liabilities as of March 31, 2023 and December 31, 2022 consisted of the following (in thousands):
March 31, 2023December 31, 2022
Accrued expenses and other(1)
$7,232 $7,589 
Contract liabilities
764 193 
Customer deposits
1,194 721 
Warranty liability
1,155 1,099 
Equipment notes payable
314 303 
Short-term insurance financing notes
2,824 2,065 
Operating lease liabilities, current
1,557 1,530 
Finance lease liabilities, current
2,128 2,116 
Total other current liabilities
$17,168 $15,616 
____________
(1)Primarily relates to accrued inventory purchases, personnel costs, wages, health benefits, vacation and other accruals.

Revenue recognized from the customer deposits balance as of December 31, 2022 was $0.2 million for the three months ended March 31, 2023.

Other Non-Current Liabilities

Other non-current liabilities as of March 31, 2023 and December 31, 2022 consisted of the following (in thousands)

March 31, 2023December 31, 2022
Accrued interest expense$1,277 $784 
Equipment notes payable, non-current860 942 
Operating lease liabilities, non-current4,770 5,174 
Finance lease liabilities, non-current3,560 4,100 
Total other non-current liabilities$10,467 $11,000