7. Intangible Assets

Intangible assets as at August 31, 2023 and February 28, 2023 were $1,375 and $1,210, respectively.

During the six-month periods ended August 31, 2023 and 2022, we made additions relating to patent application costs to intangible assets of $225 and $141, respectively.

Amortization expense for the three- and six-month periods ended August 31, 2023 amounted to $35 and $67, respectively (2022 – $21 and $40).