Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands |
Public Offering [Member]
Common Stock [Member]
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Public Offering [Member]
Additional Paid-in Capital [Member]
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Public Offering [Member]
AOCI Attributable to Parent [Member]
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Public Offering [Member]
Retained Earnings [Member]
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Public Offering [Member] |
December 2019 Public Offering [Member]
Common Stock [Member]
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December 2019 Public Offering [Member]
Additional Paid-in Capital [Member]
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December 2019 Public Offering [Member]
AOCI Attributable to Parent [Member]
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December 2019 Public Offering [Member]
Retained Earnings [Member]
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December 2019 Public Offering [Member] |
June 2019 Public Offering [Member]
Common Stock [Member]
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June 2019 Public Offering [Member]
Additional Paid-in Capital [Member]
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June 2019 Public Offering [Member]
AOCI Attributable to Parent [Member]
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June 2019 Public Offering [Member]
Retained Earnings [Member]
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June 2019 Public Offering [Member] |
The 2019 Share Purchase Agreement [Member]
Common Stock [Member]
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The 2019 Share Purchase Agreement [Member]
Additional Paid-in Capital [Member]
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The 2019 Share Purchase Agreement [Member]
AOCI Attributable to Parent [Member]
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The 2019 Share Purchase Agreement [Member]
Retained Earnings [Member]
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The 2019 Share Purchase Agreement [Member] |
The 2018 ATM Offering [Member]
Common Stock [Member]
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The 2018 ATM Offering [Member] |
The 2018 Purchase Agreement [Member]
Common Stock [Member]
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The 2018 Purchase Agreement [Member]
Additional Paid-in Capital [Member]
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The 2018 Purchase Agreement [Member]
AOCI Attributable to Parent [Member]
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The 2018 Purchase Agreement [Member]
Retained Earnings [Member]
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The 2018 Purchase Agreement [Member] |
Common Stock [Member] |
Additional Paid-in Capital [Member] |
AOCI Attributable to Parent [Member] |
Retained Earnings [Member] |
Total |
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Balance (in shares) at Dec. 31, 2018 | 38,162,000 | |||||||||||||||||||||||||||||||
Balance at Dec. 31, 2018 | $ 261,072 | $ 32,963 | $ (4,316) | $ (275,638) | $ 14,081 | |||||||||||||||||||||||||||
Common shares issued (in shares) | 18,544,000 | 11,500,000 | 1,971,000 | 77,000 | 5,502,000 | |||||||||||||||||||||||||||
Common shares issued | $ 68,588 | $ 68,588 | $ 19,594 | $ 19,594 | $ 4,730 | $ 4,730 | $ 178 | $ 178 | $ 10,000 | $ 10,000 | ||||||||||||||||||||||
Common shares issued on redemption of restricted share units (in shares) | 40,000 | |||||||||||||||||||||||||||||||
Common shares issued on redemption of restricted share units | $ 80 | (80) | ||||||||||||||||||||||||||||||
Common shares issued upon exercise of stock options (in shares) | 312,000 | 312,000 | ||||||||||||||||||||||||||||||
Common shares issued upon exercise of stock options | $ 1,248 | (530) | $ 718 | |||||||||||||||||||||||||||||
Stock-based compensation | 2,296 | 2,296 | ||||||||||||||||||||||||||||||
Other comprehensive gain | 18 | 18 | ||||||||||||||||||||||||||||||
Net loss | (26,277) | (26,277) | ||||||||||||||||||||||||||||||
Balance (in shares) at Dec. 31, 2019 | 76,108,000 | |||||||||||||||||||||||||||||||
Balance at Dec. 31, 2019 | $ 365,490 | 34,649 | (4,298) | (301,915) | 93,926 | |||||||||||||||||||||||||||
Common shares issued (in shares) | 11,854,000 | 5,502,433 | ||||||||||||||||||||||||||||||
Common shares issued | $ 58,234 | $ 58,234 | ||||||||||||||||||||||||||||||
Common shares issued on redemption of restricted share units (in shares) | 685,000 | |||||||||||||||||||||||||||||||
Common shares issued on redemption of restricted share units | $ 4,801 | (4,801) | ||||||||||||||||||||||||||||||
Common shares issued upon exercise of stock options (in shares) | 235,000 | 235,000 | ||||||||||||||||||||||||||||||
Common shares issued upon exercise of stock options | $ 998 | (425) | $ 573 | |||||||||||||||||||||||||||||
Stock-based compensation | 21,438 | 21,438 | ||||||||||||||||||||||||||||||
Other comprehensive gain | (18) | (18) | ||||||||||||||||||||||||||||||
Net loss | (55,238) | (55,238) | ||||||||||||||||||||||||||||||
Balance (in shares) at Dec. 31, 2020 | 88,882,000 | |||||||||||||||||||||||||||||||
Balance at Dec. 31, 2020 | $ 429,523 | $ 50,861 | $ (4,316) | $ (357,153) | $ 118,915 |