Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer [Abstract]

Schedule of Contract with Customer, Asset and Liability

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

	December 31,
	2021		2020
Accounts receivable	$	87,788	$	96,186
Contract assets	25,201		3,327
Customer deposits	64,809		66,171
Deferred revenue	115,476		135,578

	Years Ended December 31,
	2021		2020
Beginning balance	$	3,327	$	2,768
Transferred to accounts receivable from contract assets recognized at the beginning of the period	(1,198)		—
Revenue recognized and not billed as of the end of the period	23,072		559
Ending balance	$	25,201	$	3,327

Deferred revenue activity, including deferred incentive revenue activity, during the years ended December 31, 2021 and 2020 consisted of the following (in thousands):

	Years Ended December 31,
	2021		2020
Beginning balance	$	135,578	$	175,619
Additions	916,604		652,960
Revenue recognized	(936,706)		(693,001)
Ending balance	$	115,476	$	135,578

Disaggregation of Revenue

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

	Years Ended December 31,
	2021		2020		2019
Revenue from contracts with customers:
Product revenue	$	663,512	$	518,633	$	557,336
Installation revenue	96,059		101,887		60,826
Services revenue	144,184		109,633		95,786
Electricity revenue	3,103		1,071		10,840
Total revenue from contract with customers	906,858		731,224		724,788
Revenue from contracts accounted for as leases:
Electricity revenue	65,318		63,023		60,389
Total revenue	$	972,176	$	794,247	$	785,177