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Revenue from Contracts with Customers (Tables)
9 Months Ended
Sep. 30, 2022
Revenue from Contract with Customer [Abstract]  
Summary of Disaggregation of Revenue
The following table presents our revenue disaggregated by line of business and reportable segment for the three months ended September 30, 2022:
U.S. RegionsU.S. FederalCanadaAlternative FuelsAll OtherTotal
Project revenue$251,338 $83,878 $8,788 $— $7,527 $351,531 
O&M revenue5,936 13,524 10 2,251 133 21,854 
Energy assets11,892 1,570 1,264 26,956 — 41,682 
Integrated-PV— — — — 13,616 13,616 
Other2,040 152 2,304 214 7,903 12,613 
Total revenues$271,206 $99,124 $12,366 $29,421 $29,179 $441,296 
The following table presents our revenue disaggregated by line of business and reportable segment for the three months ended September 30, 2021:
U.S. RegionsU.S. FederalCanadaAlternative FuelsAll OtherTotal
Project revenue$91,366 $82,967 $8,339 $— $11,344 $194,016 
O&M revenue$5,957 $11,787 $— $2,167 $93 20,004 
Energy assets$9,796 $1,804 $1,409 $26,070 $155 39,234 
Integrated-PV$— $— $— $— $10,439 10,439 
Other$592 $98 $1,910 $$7,388 9,989 
Total revenues$107,711 $96,656 $11,658 $28,238 $29,419 $273,682 

The following table presents our revenue disaggregated by line of business and reportable segment for the nine months ended September 30, 2022:
U.S. RegionsU.S. FederalCanadaAlternative FuelsAll OtherTotal
Project revenue$928,616 $231,945 $32,899 $— $40,595 $1,234,055 
O&M revenue16,473 39,186 32 7,361 319 63,371 
Energy assets34,163 4,734 3,512 80,513 111 123,033 
Integrated-PV— — — — 37,239 37,239 
Other3,859 333 7,556 — 23,249 34,997 
Total revenues$983,111 $276,198 $43,999 $87,874 $101,513 $1,492,695 
The following table presents our revenue disaggregated by line of business and reportable segment for the nine months ended September 30, 2021:
U.S. RegionsU.S. FederalCanadaAlternative FuelsAll OtherTotal
Project revenue$269,021 $250,130 $24,647 $— $27,166 $570,964 
O&M revenue15,775 34,969 26 7,061 253 58,084 
Energy assets28,656 3,839 3,727 72,861 381 109,464 
Integrated-PV— — — — 30,313 30,313 
Other1,526 130 5,776 109 23,438 30,979 
Total revenues$314,978 $289,068 $34,176 $80,031 $81,551 $799,804 

The following table presents information related to our revenue recognized over time:
Three Months Ended September 30,Nine Months Ended September 30,
2022202120222021
Percentage of revenue recognized over time95%93%96%94%
The remainder of our revenue is for products and services transferred at a point in time, at which point revenue is recognized.
We attribute revenues to customers based on the location of the customer. The following table presents information related to our revenues by geographic area:
Three Months Ended September 30,Nine Months Ended September 30,
2022202120222021
United States$421,939 $250,441 $1,409,210 $736,986 
Canada11,416 10,832 40,429 31,658 
Other7,941 12,409 43,056 31,160 
Total revenues$441,296 $273,682 $1,492,695 $799,804 
Summary of Contract with Customer, Asset and Liability
The following tables provide information about receivables, contract assets and contract liabilities from contracts with customers:
 September 30, 2022December 31, 2021
Accounts receivable, net$219,817 $161,970 
Accounts receivable retainage, net$42,456 $43,067 
Contract Assets:
Costs and estimated earnings in excess of billings $628,529 $306,172 
Contract Liabilities:
Billings in excess of cost and estimated earnings$43,173 $35,918 
Billings in excess of cost and estimated earnings, non-current (1)
6,310 6,481 
Total contract liabilities$49,483 $42,399 
September 30, 2021December 31, 2020
Accounts receivable, net$112,893 $125,010 
Accounts receivable retainage, net$39,404 $30,189 
Contract Assets:
Costs and estimated earnings in excess of billings$213,468 $185,960 
Contract Liabilities:
Billings in excess of cost and estimated earnings$28,018 $33,984 
Billings in excess of cost and estimated earnings, non-current (1)
6,795 6,631 
Total contract liabilities$34,813 $40,615 
(1) Performance obligations that are expected to be completed beyond the next twelve months and are included in other liabilities in the condensed consolidated balance sheets.