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Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2022

Revenue recognition

Disaggregation of revenue

​

​	​	​	​	​	​	​
​	​	Three		​	Three
​	​	Months Ended		​	Months Ended
​	​	March 31,		​	March 31,
(in thousands)		2022			2021
Charging revenue, retail		$	3,502		$	1,803
Charging revenue, OEM	​		151	​		332
Charging revenue, commercial	​		709	​		491
Network revenue, OEM	​		490	​		532
Ancillary revenue	​		1,470	​		403
Regulatory credit sales	​		1,378	​		569
Total revenue	​	$	7,700	​	$	4,130

Contract assets and liabilities and liabilities activity

​

​	​	​	​	​	​	​
​	​	March 31,		​	December 31,
(in thousands)	​	2022		​	2021
Contract assets	​	$	—	​	$	32
Contract liabilities	​		37,022	​		38,445

​

​	​	​	​
​	​	Three Months Ended
​	​	March 31,
(in thousands)	​	2022
Balance as of December 31, 2021	​	$	38,445
Additions	​		377
Recognized in revenue	​		(1,276)
Marketing activities	​		(524)
Balance as of March 31, 2022	​	$	37,022

Schedule of deferred revenue to be recognized

​

​	​	​	​
(in thousands)	​	​	​
2022	​	$	1,481
2023	​		1,219
2024	​		687
2025	​		7
​	​	$	3,394

X

- Definition

Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045

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X

- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045

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- References

No definition available.

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X

- Definition

Tabular disclosure of expected timing for satisfying remaining performance obligation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045

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