Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2022

Revenue Recognition

Disaggregation of revenue

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in thousands)	2022		2021		2022		2021
Charging revenue, retail	$	5,176	$	3,203	$	13,067	$	7,505
Charging revenue, OEM		252		151		592		633
Charging revenue, commercial		678		688		2,041		1,725
Network revenue, OEM		448		351		1,825		1,158
Ancillary revenue		2,777		1,104		5,076		2,147
Regulatory credit sales		1,178		684		4,684		1,927
Total revenue	$	10,509	$	6,181	$	27,285	$	15,095

Contract assets and liabilities and liabilities activity

	September 30,		December 31,
(in thousands)	2022		2021
Contract assets	$	1,837	$	32
Contract liabilities	$	40,194	$	38,445

	Nine Months Ended
	September 30,
(in thousands)	2022
Balance as of December 31, 2021	$	38,445
Additions		7,284
Recognized in revenue		(4,375)
Marketing activities		(1,160)
Balance as of September 30, 2022	$	40,194

Schedule of deferred revenue to be recognized

(in thousands)
2022	$	622
2023		2,189
2024		3,178
2025		5,989
2026		11,119
	$	23,097