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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock | Treasury Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income | Accumulated Deficit
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2016 | $ 11,118 | $ 8 | $ (863) | $ 12,613 | $ (2) | $ (638)
Balance, shares at Dec. 31, 2016 |  | 8,335,968 |  |  |  |
Common stock issued to ESPP | 13 |  |  | 13 |  |
Common stock issued to ESPP, shares |  | 7,151 |  |  |  |
Common stock issued for accrued dividends on preferred stock | 150 |  |  | 150 |  |
Common stock issued for accrued dividends on preferred stock, shares |  | 82,268 |  |  |  |
Common stock issued as payment of preferred stock |  | $ 1 |  | (1) |  |
Common stock issued as payment of preferred stock, shares |  | 164,535 |  |  |  |
Accretion of discount on preferred stock | (56) |  |  | (56) |  |
Treasury stock purchase, Value | (53) |  | (53) |  |  |
Treasury stock purchase, Shares |  | (17,342) |  |  |  |
Restricted stock units | 371 |  |  | 371 |  |
Restricted stock units, shares |  | 97,070 |  |  |  |
Net loss | (2,228) |  |  |  |  | (2,228)
Warrants issued as part of debt refinancing | 365 |  |  | 365 |  |
Other comprehensive income | 403 |  |  |  | 403 |
Balance at Dec. 31, 2017 | 10,083 | $ 9 | (916) | 13,455 | 401 | (2,866)
Balance, shares at Dec. 31, 2017 |  | 8,669,650 |  |  |  |
Common stock issued to ESPP | 10 |  |  | 10 |  |
Common stock issued to ESPP, shares |  | 7,614 |  |  |  |
Common stock issued as payment of preferred stock, shares |  | 281,858 |  |  |  |
Accretion of discount on preferred stock | (60) |  |  | (60) |  |
Treasury stock purchase, Value | (49) |  | (49) |  |  |
Treasury stock purchase, Shares |  | (44,726) |  |  |  |
Restricted stock units | 609 |  |  | 609 |  |
Restricted stock units, shares |  | 304,874 |  |  |  |
Net loss | (2,557) |  |  |  |  | (2,557)
Other comprehensive income | (818) |  |  |  | (818) |
Balance at Dec. 31, 2018 | $ 7,218 | $ 9 | $ (965) | $ 14,014 | $ (417) | $ (5,423)
Balance, shares at Dec. 31, 2018 |  | 9,219,270 |  |  |  |

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