Depreciation is calculated on a declining balance basis except for leasehold improvements, demonstration equipment and right of use assets which are on a straight-line basis over their useful lives and are generally recognized in profit or loss.

Estimated useful lives of property and equipment are as follows:

Computer equipment                                                                                                      3 years

Laboratory and office equipment                                                                                   3 years

Furniture and fixtures                                                                                                     5 years

Manufacturing equipment and tools                                                                                5 years

Demonstration equipment                                                                                              5 years

Leasehold improvements                                                                                                  Term

of lease

Right-of-use assets                                                                                                          Term

Depreciation methods, useful lives and residual values are reviewed at the reporting date and adjusted as appropriate.

(g) Intangible assets

Intangible assets consist of technology licenses, patents and trademarks and are recorded at cost less amortization and accumulated impairment losses. Intangible assets acquired separately are measured on initial recognition at cost. The cost of intangible assets acquired in a business combination is their fair value at the date of acquisition. Following initial recognition, intangible assets are carried at cost less any accumulated amortization and accumulated impairment losses. Internally generated intangibles, excluding capitalized development costs, are not capitalized and the related expenditure is reflected in profit or loss in the year in which the expenditure is incurred.

The useful lives of intangible assets are assessed as either finite or indefinite. Intangible assets with finite lives are amortized over the estimated useful economic life and assessed for impairment whenever there is an indication that the intangible asset may be impaired. The amortization period and the amortization method for an intangible asset with a finite useful life are reviewed at the end of each reporting date.

Changes in the expected useful life or the expected pattern of consumption of future economic benefits embodied in the asset are considered to modify the amortization period or method, as appropriate, and are treated as changes in accounting estimates. The amortization expense on intangible assets with finite lives is recognized in profit or loss in the expense category that is consistent with the function of the intangible assets.

Intangible assets with indefinite useful lives are not amortized, however they are tested for impairment at each reporting date either individually or at the cash-generating unit level. The assessment of indefinite life is reviewed each reporting date to determine whether the indefinite life continues to be supportable. If not, the change in useful life from indefinite to finite is made on a prospective basis.

Gains or losses arising from derecognition of an intangible asset are measured as the difference between the net disposal proceeds and the carrying amount of the asset and are recognized in profit or loss when the asset is derecognized.

(h) Impairment

(i)  Impairment of financial assets

An expected credit loss ("ECL") model applies to financial assets measured at amortized cost and debt investments at FVOCI, but not to investments in equity instruments. The Company's financial assets measured at amortized cost and subject to the ECL model consist primarily of accounts receivable.

The Company measures the loss allowance on accounts receivable at an amount equal to the lifetime ECL. To measure ECL on a collective basis, trade receivables are grouped based on similar credit risk and aging. The expected loss rates are based on the Company's historical credit losses experienced and are updated to reflect the effects of the current conditions and forecasts of future conditions that did not affect the period on which the historical data is based.

Accounts receivable are written off when there is no reasonable expectation of recovery. Indicators that there is no reasonable expectation of recovery include, amongst others, the failure of a debtor to make contractual payments for a period of greater than 90 days past due.