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Other current liabilities
 12 Months Ended
Dec. 31, 2022
Miscellaneous current liabilities [abstract]  
Other current liabilities Other current liabilities
Amounts in thousands USDAs of December 31, 2022As of December 31, 2021
Salaries and wages$13,274$6,306
Advance invoiced customers1,6945,447
Royalties2,3211,233
Other current liabilities8,4116,663
Total$25,700$19,649

Advance invoiced customers represent a contract liability. Beginning January 1, 2022, the Company had a liability balance of $5,447 thousand for advance invoiced customers. During fiscal year 2022, the Company recognized $5,342 thousand of the advances from invoiced customers as revenue. Beginning January 1, 2021, the Company had a liability balance of $7,367 thousand for advance invoiced customers. During fiscal year 2021, the Company recognized $7,092 thousand of the advances from customers as revenue.