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Summary of Significant Accounting Policies and Other Information - Narrative (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 USD ($) boardMember | Jun. 30, 2022 USD ($) | Jun. 30, 2023 USD ($) boardMember segment | Jun. 30, 2022 USD ($) | Dec. 31, 2022 USD ($)
Concentration Risk [Line Items] |  |  |  |  |
Number of board members | boardMember | 4 |  | 4 |  |
Debt, long-term and short-term, combined amount | $ 190,300 |  | $ 190,300 |  | $ 211,000
Cash and cash equivalents | 27,782 | $ 3,448 | $ 27,782 | $ 3,448 | 24,296
Number of operating segments | segment |  |  | 1 |  |
Research and development and engineering expenses | 4,700 | 4,500 | $ 9,300 | 9,100 |
Restricted cash | 3,760 | $ 3,450 | 3,760 | $ 3,450 | 3,604
Specific warranty-related matter accrual | 1,200 |  | 1,200 |  |
Contract With Customer |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Restricted cash | $ 1,300 |  | $ 1,300 |  | $ 1,300

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 954 -SubTopic 310 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481027/954-310-50-2 + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-18 + Details
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