Summary of Significant Accounting Policies - Additional Information (Detail) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022 USD ($) $ / shares	Jun. 30, 2021 USD ($) $ / shares	Jun. 30, 2022 USD ($) Customer $ / shares	Jun. 30, 2021 USD ($) $ / shares	Dec. 31, 2021 USD ($) Customer	Dec. 31, 2020 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Deferred revenue	$ 2,660,000		$ 2,660,000		$ 2,380,000
Deferred revenue recognized out of prior period balance			157,000	$ 157,000	121,000	$ 121,000
Deferred revenue recognized in next 12 months			1,020
Revenue Due to Changes in Regulation			288,000
Financing receivable, Net	320,000		320,000
Total sales return reserve from buyback options	130,000		130,000		223,000
Sales return reserve from short term buyback options	56,000		$ 56,000		$ 91,000
Number of customers representing more than ten percentage of accounts receivable | Customer			0		0
Allowance for credit losses					$ 41,000
MyPower customer notes receivable, net of allowance for credit losses	287,000		$ 287,000		299,000
MyPower customer notes receivable, net of allowance for credit losses, current	8,000		8,000		11,000
Other non-current assets	2,952,000		$ 2,952,000		$ 2,138,000
Accounts receivable from OEM customers excess percentage			10.00%		10.00%
Gross cost of operating lease vehicles	5,730,000		$ 5,730,000		$ 5,280,000
Net accumulated depreciation related to leased vehicles	955,000		$ 955,000		773,000
Product warranty description			a warranty on the installation and components of the energy generation and storage systems we sell for periods typically between 10 to 25 years
Sales-type leasing revenue	133,000	$ 55,000	$ 398,000	97,000
Sales-type leasing cost of revenue	$ 82,000	$ 36,000	246,000	62,000
Purchases of digital assets, amount			$ 1,500,000	$ 1,500,000
Earnings Per Share, Diluted | $ / shares	$ 1.95	$ 1.02	$ 4.82	$ 1.41
Unrecognized tax benefits	$ 601,000		$ 601,000		531,000
Unrecognized tax benefits, that would not affect effective tax rate	482,000		$ 482,000		473,000
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Income tax examination, years			2019
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Income tax examination, years			2021
Government Rebates Receivables [Member]
Summary Of Significant Accounting Policies [Line Items]
Other non-current assets	759,000		$ 759,000		627,000
Federal [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Income tax examination, years			2004
Federal [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Income tax examination, years			2014
IRS [Member] | Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Income tax examination, years			2015
IRS [Member] | Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Income tax examination, years			2018
Shanghai, China [Member]
Summary Of Significant Accounting Policies [Line Items]
Corporate income tax rate to certain enterprises			15.00%
Corporate income tax rate			25.00%
Beneficial income tax rate			15.00%
Energy Generation and Storage [Member]
Summary Of Significant Accounting Policies [Line Items]
Financing receivable, Net	238,000		$ 238,000
Customer payments [Member] | Energy Generation and Storage [Member]
Summary Of Significant Accounting Policies [Line Items]
Deferred revenue	678,000		678,000		399,000
Deferred revenue recognized in next 12 months			12,000
Revenue recognized			66,000	$ 66,000	$ 79,000	$ 79,000
Unbilled transaction price allocated to performance obligations, expected of more than one year	$ 211,000		$ 211,000