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Consolidated Statements of Changes in Stockholders' Equity - USD ($) | Total | Common Stock [Member] | Stock Warrants [Member] | Additional Paid-in Capital [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Retained Earnings [Member]
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2014 | $ 36,778,856 | $ 81,657 | $ 0 | $ 92,661,000 | $ (147,515) | $ (55,816,286)
Balance (in shares) at Dec. 31, 2014 |  | 81,656,763 |  |  |  |
Common stock issued under stock plan, option exercises | $ 701,705 | $ 864 | 0 | 700,841 |  |
Common stock issued under stock plan, option exercises (in shares) | 863,933 | 863,933 |  |  |  |
Stock compensation expense | $ 299,337 | $ 0 | 0 | 299,337 | 0 | 0
Foreign currency translation loss | (122,625) |  |  |  | (122,625) |
Net loss | (5,466,607) | 0 | 0 | 0 | 0 | (5,466,607)
Balance at Dec. 31, 2015 | $ 32,190,666 | $ 82,521 | 0 | 93,661,178 | (270,140) | (61,282,893)
Balance (in shares) at Dec. 31, 2015 |  | 82,520,696 |  |  |  |
Common stock issued under stock plan, option exercises (in shares) | 0 |  |  |  |  |
Stock compensation expense | $ 310,989 |  |  | 310,989 |  |
Common stock issued under stock plan, restricted stock award vesting (net of shares withheld for taxes) | (51,863) | $ 209 | 0 | (52,072) | 0 | 0
Common stock issued under stock plan, restricted stock award vesting (net of shares withheld for taxes) (in shares) |  | 209,438 |  |  |  |
Foreign currency translation loss | (39,229) |  |  |  | (39,229) |
Net loss | (4,133,912) | $ 0 | 0 | 0 | 0 | (4,133,912)
Balance at Dec. 31, 2016 | $ 28,276,651 | $ 82,730 | $ 0 | $ 93,920,095 | $ (309,369) | $ (65,416,805)
Balance (in shares) at Dec. 31, 2016 |  | 82,730,134 |  |  |  |

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