11. Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2022

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue, by Type of Revenue [Table Text Block]

The following table presents the disaggregation of revenue from contracts with customers for the three months ended March 31, 2022 and 2021 along with the reportable segment for each category (in thousands):

		Three Months Ended March 31,
Category	Segment	2022		2021
Solar modules	Modules	$	354,881	$	534,670
Energy generation	Other	6,293		14,579
O&M services	Other	3,897		27,235
Solar power systems	Other	1,969		226,967
EPC services (1)	Other	—		(77)
Net sales		$	367,040	$	803,374

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(1)For certain of our engineering, procurement, and construction (“EPC”) agreements, we provide an energy performance test during the first or second year of a system’s operation to demonstrate that the actual energy generation for the applicable period meets or exceeds the modeled energy expectation, after certain adjustments. If there is an underperformance event with regard to these tests, we may incur liquidated damages as specified in the applicable EPC agreement. During the three months ended March 31, 2021, we accrued liquidated damages for certain of these agreements, which we recognized as a reduction to revenue.

Changes in Contract Assets and Liabilities [Table Text Block]

The following table reflects the changes in our contract assets, which we classify as “Accounts receivable unbilled, net” and our contract liabilities, which we classify as “Deferred revenue,” for the three months ended March 31, 2022 (in thousands):

	March 31, 2022		December 31, 2021		Three Month Change
Accounts receivable unbilled, net (1)	$	48,151	$	46,113	$	2,038	4	%
Deferred revenue (2)	$	373,808	$	297,811	$	75,997	26	%

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(1)Includes $19.4 million and $20.8 million of noncurrent accounts receivable unbilled, net classified as “Other assets” on our condensed consolidated balance sheets as of March 31, 2022 and December 31, 2021, respectively.

(2)Includes $154.9 million and $95.9 million of noncurrent deferred revenue classified as “Other liabilities” on our condensed consolidated balance sheets as of March 31, 2022 and December 31, 2021, respectively.