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Accounts and Other Receivables
6 Months Ended
Jun. 30, 2023
Receivables [Abstract]  
Accounts and Other Receivables Accounts and Other Receivables
Accounts and other receivables include reimbursement requests outstanding from the DOE awards, interest receivable and commercial accounts receivable. The DOE reimbursement requests are recognized as eligible costs are incurred. Reimbursement under the awards is recognized as award funds are obligated, and are included in Sponsored cost share in the condensed consolidated statement of operations. Interest receivable of $556 and $1,021 was outstanding at June 30, 2023 and December 31, 2022, respectively.

The majority of our receivables are either due from the U.S. federal government or have to do with a federal project. For these reasons, all receivables are deemed to be fully collectible and no allowance has been recorded.