Revenue Recognition

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Revenue Recognition

Contract Balances

The following table provides information about accounts receivables, contract assets, customer deposits and deferred revenue from contracts with customers (in thousands):

	March 31,		December 31,
	2024		2023
Accounts receivable	$	348,422	$	340,740
Contract assets	33,788		41,366
Customer deposits	75,140		75,734
Deferred revenue	59,468		72,328

Contract assets relate to contracts for which revenue is recognized upon transfer of control of performance obligations, but where billing milestones have not been reached. Customer deposits and deferred revenue include payments received from customers or invoiced amounts prior to transfer of control of performance obligations.

Contract assets and contract liabilities are reported in a net position on an individual contract basis at the end of each reporting period. Contract assets are classified as current in the condensed consolidated balance sheets when both the milestones other than the passage of time, are expected to be complete and the customer is invoiced within one year of the balance sheet date, and as long-term when both the above-mentioned milestones are expected to be complete, and the customer is invoiced more than one year out from the balance sheet date. Contract liabilities are classified as current in the condensed consolidated balance sheets when the revenue recognition associated with the related customer payments and invoicing is expected to occur within one year of the balance sheet date and as long-term when the revenue recognition associated with the related customer payments and invoicing is expected to occur in more than one year from the balance sheet date.

Contract Assets

	Three Months Ended March 31,
	2024		2023
Beginning balance	$	41,366	$	46,727
Transferred to accounts receivable from contract assets recognized at the beginning of the period	(18,123)		(10,787)
Revenue recognized and not billed as of the end of the period	10,545		11,838
Ending balance	$	33,788	$	47,778

Deferred Revenue

Deferred revenue activity during the three months ended March 31, 2024 and 2023, consisted of the following (in thousands):

	Three Months Ended March 31,
	2024		2023
Beginning balance	$	72,328	$	94,355
Additions	176,484		224,939
Revenue recognized	(189,344)		(231,446)
Ending balance	$	59,468	$	87,848

Deferred revenue is equivalent to the total transaction price allocated to the performance obligations that are unsatisfied, or partially unsatisfied, as of the end of the period. The primary component of deferred revenue at the end of the period consists of performance obligations relating to the provision of maintenance services under current contracts and future renewal periods.

Some of these obligations provide customers with material rights over a period that we estimate to be largely commensurate with the period of their expected use of the associated Energy Servers. As a result, we expect to recognize these amounts as revenue over a period of up to 21 years, predominantly on a relative standalone selling price basis that reflects the cost of providing these services. Deferred revenue also includes performance obligations relating to product acceptance and installation. A significant amount of this deferred revenue is reflected as additions and revenue recognized in the same 12-month period, and a portion of this deferred revenue is expected to be recognized beyond this 12-month period mainly due to deployment schedules.

We do not disclose the value of the unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed.

Disaggregated Revenue

We disaggregate revenue from contracts with customers into four revenue categories: product, installation, services and electricity (in thousands):

	Three Months Ended March 31,
	2024		2023
Revenue from contracts with customers:
Product revenue	$	153,364	$	193,745
Installation revenue	11,444		20,525
Services revenue	56,460		40,663
Electricity revenue	4,827		3,838
Total revenue from contract with customers	226,095		258,771
Revenue from contracts that contain leases:
Electricity revenue	9,203		16,420
Total revenue	$	235,298	$	275,191