6. INVENTORIES

The following table summarizes inventories, net (in thousands):

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Inventories as of December 31, 2023 and 2022 include inventories acquired from Forma pursuant to the license and transition agreement. As of December 31, 2023 and 2022, zero and $0.8 million, respectively, of advance payments to the manufacturer of our raw materials were included within prepaid and other current assets in the balance sheet.

Non-current inventories consist of active pharmaceutical ingredient classified as raw materials which have multi-year shelf life, as well as certain work in process and finished goods inventories that are not expected to be consumed beyond our normal operating cycle.