Net Income (Loss) Per Common Share	9 Months Ended
Sep. 30, 2023
Earnings Per Share [Abstract]
Net Income (Loss) Per Common Share	3. Net income (loss) per common share: Basic net income (loss) per common share is calculated using the two-class method required for participating securities which includes the Series 1 Preferred Shares as a separate class for the nine months ended September 30, 2022. The convertible preferred shares entitle the holders to participate in dividends and in earnings and losses of the Company on an equivalent basis as common shares. Accordingly, undistributed earnings (losses) are allocated to common shares and participating preferred shares based on the weighted-average shares of each class outstanding during the period. In March 2022, the outstanding 1,016,000 Series 1 Preferred Shares were converted and exchanged for an equal number of common shares of the Company (note 8b). The weighted average number of common shares used in the basic and diluted net income (loss) per common share calculations includes the weighted-average pre-funded warrants outstanding during the period as they are exercisable at any time for nominal cash consideration. The treasury stock method is used to compute the dilutive effect of the Company’s stock options and warrants. Under this method, the incremental number of common shares used in computing diluted net income (loss) per common share is the difference between the number of common shares assumed issued and purchased using assumed proceeds. The if-converted method is used to compute the dilutive effect of the Company’s convertible preferred shares. Under the if-converted method, dividends on the preferred shares, if applicable, are added back to earnings attributable to common shareholders, and the preferred shares and paid-in kind dividends are assumed to have been converted at the share price applicable at the end of the period. The if-converted method is applied only if the effect is dilutive. For the three and nine months ended September 30, 2023 and 2022, diluted net loss per share attributable to common shareholders is the same as basic net loss per share attributable to common shareholders, since dilutive common shares are not assumed to have been issued if their effect is anti-dilutive.

Net Income (Loss) Per Common Share

9 Months Ended

Sep. 30, 2023

Net income (loss) per common share:

Basic net income (loss) per common share is calculated using the two-class method required for participating securities which includes the Series 1 Preferred Shares as a separate class for the nine months ended September 30, 2022. The convertible preferred shares entitle the holders to participate in dividends and in earnings and losses of the Company on an equivalent basis as common shares. Accordingly, undistributed earnings (losses) are allocated to common shares and participating preferred shares based on the weighted-average shares of each class outstanding during the period. In March 2022, the outstanding 1,016,000 Series 1 Preferred Shares were converted and exchanged for an equal number of common shares of the Company (note 8b).

The weighted average number of common shares used in the basic and diluted net income (loss) per common share calculations includes the weighted-average pre-funded warrants outstanding during the period as they are exercisable at any time for nominal cash consideration.

The treasury stock method is used to compute the dilutive effect of the Company’s stock options and warrants. Under this method, the incremental number of common shares used in computing diluted net income (loss) per common share is the difference between the number of common shares assumed issued and purchased using assumed proceeds.

The if-converted method is used to compute the dilutive effect of the Company’s convertible preferred shares. Under the if-converted method, dividends on the preferred shares, if applicable, are added back to earnings attributable to common shareholders, and the preferred shares and paid-in kind dividends are assumed to have been converted at the share price applicable at the end of the period. The if-converted method is applied only if the effect is dilutive.

For the three and nine months ended September 30, 2023 and 2022, diluted net loss per share attributable to common shareholders is the same as basic net loss per share attributable to common shareholders, since dilutive common shares are not assumed to have been issued if their effect is anti-dilutive.