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CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY - USD ($) $ in Thousands | Common Stock [Member] | Accumulated Deficit [Member] | Accumulated Other Comprehensive Income/(Loss) [Member] | Total
--- | --- | --- | --- | ---
Balances, beginning of period at Dec. 31, 2017 | $ 456,053 | $ (426,968) | $ (2) | $ 29,083
Balances, beginning of period (in shares) at Dec. 31, 2017 | 99,412,007 |  |  |
Shares issued (exercise of stock options) (Note 6) (in shares) |  |  |  | 218,600
Net loss |  |  |  | $ (8,714)
Balances, end of period at Dec. 31, 2018 | $ 456,938 | (435,684) |  | 21,254
Balances, end of period (in shares) at Dec. 31, 2018 | 100,268,161 |  |  |
Adjusted balance | Accounting Standards Update 2016-01 |  | (2) | $ 2 |
Adjusted balance | $ 456,053 | (426,970) |  | 29,083
Shares issued (RSUs vested, net of shares withheld) (Note 6) | $ (122) |  |  | (122)
Shares issued (RSUs vested, net of shares withheld) (Note 6) (in shares) | 637,554 |  |  |
Shares issued (exercise of stock options) (Note 6) | $ 86 |  |  | 86
Shares issued (exercise of stock options) (Note 6) (in shares) | 218,600 |  |  |
Stock-based compensation (Note 6) | $ 982 |  |  | 982
Option amendment (Note 6) | (61) |  |  | (61)
Net loss |  | (8,714) |  | (8,714)
Balances, end of period at Dec. 31, 2018 | $ 456,938 | (435,684) |  | 21,254
Balances, end of period (in shares) at Dec. 31, 2018 | 100,268,161 |  |  |
Shares issued (RSUs vested, net of shares withheld) (Note 6) | $ (76) |  |  | (76)
Shares issued (RSUs vested, net of shares withheld) (Note 6) (in shares) | 266,296 |  |  |
Shares issued (exercise of stock options) (Note 6) | $ 89 |  |  | $ 89
Shares issued (exercise of stock options) (Note 6) (in shares) | 163,667 |  |  | 163,667
Stock-based compensation (Note 6) | $ 765 |  |  | $ 765
Net loss |  | (9,386) |  | (9,386)
Balances, end of period at Dec. 31, 2019 | $ 457,716 | $ (445,070) |  | $ 12,646
Balances, end of period (in shares) at Dec. 31, 2019 | 100,698,124 |  |  |

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