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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Preferred Stock | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Loss | Accumulated Deficit | Total
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2015 |  | $ 3 | $ 342,587 | $ (596) | $ (323,159) | $ 18,835
Balance (in shares) at Dec. 31, 2015 | 335,273 | 2,965,208 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Issue of common stock on At Market Issuance sales agreement |  | $ 1 | 6,793 |  |  | 6,794
Issue of common stock on At Market Issuance sales agreement (in shares) |  | 1,291,621 |  |  |  |
Stock-based compensation |  |  | 782 |  |  | 782
Preferred stock dividends |  |  | (200) |  |  | (200)
Unrealized foreign exchange on intercompany loans |  |  |  | (27,351) |  | (27,351)
Translation adjustment |  |  |  | 27,204 |  | 27,204
Loss for the period |  |  |  |  | (11,791) | (11,791)
Cumulative effect of change in Accounting Principle for ASU 2016-09 at Dec. 31, 2016 |  |  | 89 |  | (89) |
Balance at Dec. 31, 2016 |  | $ 4 | 350,051 | (743) | (335,039) | 14,273
Balance (in shares) at Dec. 31, 2016 | 335,273 | 4,256,829 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Issue of common stock, preferred stock and associated warrants on underwritten offering, net of expenses |  | $ 3 | 13,681 |  |  | 13,684
Issue of common stock, preferred stock and associated warrants on underwritten offering, net of expenses (in shares) | 8,872 | 3,154,000 |  |  |  |
Series A Preferred stock conversions |  | $ 4 | (4) |  |  |
Series A Preferred stock conversions (in shares) | (8,608) | 4,304,000 |  |  |  |
Warrant exercise |  |  | 199 |  |  | 199
Warrant exercise (in shares) |  | 99,500 |  |  |  |
Issue of common stock on At Market Issuance sales agreement |  | $ 1 | 1,065 |  |  | 1,066
Issue of common stock on At Market Issuance sales agreement (in shares) |  | 183,118 |  |  |  |
Stock-based compensation |  |  | 266 |  |  | 266
Preferred stock dividends |  |  | (201) |  |  | (201)
Unrealized foreign exchange on intercompany loans |  |  |  | 14,636 |  | 14,636
Translation adjustment |  |  |  | (14,687) |  | (14,687)
Loss for the period |  |  |  |  | (7,470) | (7,470)
Balance at Dec. 31, 2017 |  | $ 12 | $ 365,057 | $ (794) | $ (342,509) | $ 21,766
Balance (in shares) at Dec. 31, 2017 | 335,537 | 11,997,447 |  |  |  |

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