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Grant Expense, Net	12 Months Ended
Grant Expense, Net	Dec. 31, 2022
Other Income and Expenses [Abstract]
Grant Expense, Net	Grant Expense, Net From time-to-time, the Company has entered into grant agreements with the California Energy Commission (“CEC”) for conducting studies to demonstrate the benefits of certain energy-saving technologies to utility companies and consumers in the State of California. Under such agreements, the Company is entitled to receive reimbursement of costs incurred by the Company covered by the grants. For the years ended December 31, 2022 and 2021, the Company received $1,007 and $— in reimbursement payments, respectively, from the CEC. As of December 31, 2022 and 2021, the Company had grant receivables in the amounts of $263 and $1,020, which were included in other current assets in the consolidated balance sheets. There was no deferred grant income as of December 31, 2022 and 2021. Related expenses incurred by the Company are offset against grant income earned or received from the CEC. During the years ended December 31, 2022 and 2021, grant (income) expense, net was ($16) and $269, respectively.