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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2023
Schedule II - Valuation and Qualifying Accounts |
Schedule II - Valuation and Qualifying Accounts | Schedule II — Valuation and Qualifying Accounts ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Additions | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Charged | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Balance at |  | (Credited) |  | Charged to |  | ​ | ​ |  | Balance at
​ | ​ | Beginning | ​ | to Costs and | ​ | Other | ​ | ​ | ​ | ​ | End of
Deducted from asset accounts: | ​ | of Period | ​ | Expenses | ​ | Accounts | ​ | Deductions | ​ | Period
​ | ​ | (in thousands)
Year ended December 31, 2023 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Allowance for doubtful accounts | ​ | $ | 736 | ​ | $ | 316 | ​ | $ | — | ​ | $ | (66) | ​ | $ | 986
Valuation allowance in net deferred tax assets | ​ |  | 11,083 | ​ |  | 662 | ​ |  | — | ​ |  | — | ​ |  | 11,745
​ | ​ | $ | 11,819 | ​ | $ | 978 | ​ | $ | — | ​ | $ | (66) | ​ | $ | 12,731
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Year ended December 31, 2022 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Allowance for doubtful accounts | ​ | $ | 736 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 736
Valuation allowance in net deferred tax assets | ​ |  | 116,054 | ​ |  | (104,971) | ​ |  | — | ​ |  | ​ | ​ |  | 11,083
​ | ​ | $ | 116,790 | ​ | $ | (104,971) | ​ | $ | — | ​ | $ | — | ​ | $ | 11,819
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Year ended December 31, 2021 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Allowance for doubtful accounts | ​ | $ | 736 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 736
Valuation allowance in net deferred tax assets | ​ |  | 118,443 | ​ |  | — | ​ |  | — | ​ |  | (2,389) | ​ |  | 116,054
​ | ​ | $ | 119,179 | ​ | $ | — | ​ | $ | — | ​ | $ | (2,389) | ​ | $ | 116,790
​

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4 + Details
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- References No definition available. + Details
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