4. Certain Balance Sheet Items

The following table summarizes inventories (in thousands):

The following table summarizes other current assets (in thousands):

The following table summarizes other assets (in thousands):

4.      Certain Balance Sheet Items

The following table summarizes inventories (in thousands):

The following table summarizes other current assets (in thousands):

The following table summarizes property and equipment (in thousands):

(1)      Includes the impact of foreign currency exchange rate fluctuations.

Depreciation expense for property and equipment was $2,000 and $4,000 for the years ended December 31, 2020 and 2019, respectively.

The following table summarizes other assets (in thousands):