Property and equipment are depreciated using the straight-line method based on the following estimated useful lives:

During the year ended April 30, 2026, the estimated useful life of the medical rental equipment asset class was changed prospectively from 2 - 8 years to 2 - 15 years. This change was the result of actual field experience, established preventive maintenance programs, and an extensive engineering study completed during the period relating to the WCD monitor and battery charger. As a result, the useful life of the battery charger was changed from five years to fifteen years and the useful life of the WCD monitor was changed from seven years to fifteen years. The impact of the change was a reduction of depreciation expense, which is included within cost of revenue, by $1,410 in the year ended April 30, 2026, as compared to the useful life of medical rental equipment had it remained at 2 - 8 years. The net loss per share impact of the change is not material.

When assets are retired or otherwise disposed of, the cost and related accumulated depreciation are removed from the accounts, and any resulting gain or loss is recognized in the consolidated statements of operations and comprehensive loss for the period.