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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN CAPITAL DEFICIENCY - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Beginning balance |  | $ (67,485) | $ (42,742) | $ (52,881) |  | $ (29,457) |
Share-based compensation related to stock options |  | 196 | 22 | 599 |  | 80 |
Share-based compensation related to restricted stock award |  |  |  |  |  | 16 |
Convertible notes conversions |  |  |  |  |  | 1,291 |
Convertible notes exchange |  |  | 99 |  |  | 1,150 |
Net loss for the period |  | (3,560) | (5,322) | (18,567) |  | (21,023) |
Ending balance |  | (70,849) | (47,943) | (70,849) |  | (47,943) |
Common Stock [Member] |  |  |  |  |  |  |
Beginning balance |  | $ 148 | $ 148 | $ 148 |  | $ 144 |
Beginning balance (in shares) |  | 148,382,299 | 148,183,591 | 148,382,299 | [1] | 143,728,797 | [1]
Share-based compensation related to restricted stock award | [2] |  |  |  |  |  |
Share-based compensation related to restricted stock award (in shares) | [1] |  |  |  |  | 29,898 |
Convertible notes conversions |  |  |  |  |  | $ 2 |
Convertible notes conversions (in shares) | [1] |  |  |  |  | 1,928,907 |
Convertible notes exchange |  |  |  |  |  | $ 2 |
Convertible notes exchange (in shares) |  |  | 117,647 |  |  | 2,613,636 |
Ending balance |  | $ 148 | $ 148 | $ 148 |  | $ 148 |
Ending balance (in shares) | [1] | 148,382,299 | 148,301,238 | 148,382,299 |  | 148,301,238 |
Additional Paid-in Capital [Member] |  |  |  |  |  |  |
Beginning balance |  | $ 269,927 | $ 268,907 | $ 269,524 |  | $ 266,495 |
Share-based compensation related to stock options |  | 196 | 22 | 599 |  | 80 |
Share-based compensation related to restricted stock award |  |  |  |  |  | 16 |
Convertible notes conversions |  |  |  |  |  | 1,289 |
Convertible notes exchange |  |  | 99 |  |  | 1,148 |
Ending balance |  | 270,123 | 269,028 | 270,123 |  | 269,028 |
Accumulated Deficit [Member] |  |  |  |  |  |  |
Beginning balance |  | (337,560) | (311,797) | (322,553) |  | (296,096) |
Net loss for the period |  | (3,560) | (5,322) | (18,567) |  | (21,023) |
Ending balance |  | $ (341,120) | $ (317,119) | $ (341,120) |  | $ (317,119) |
[1] | Common Stock, $0.001 par value; Authorized - as of September 30, 2019 and 2018 - 350,000,000 and 250,000,000, respectively.
[2] | Represents an amount less than $1.

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