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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) | Total | Common Stock | Additional Paid in Capital | Accumulated Deficit | Treasury Stock
--- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2017 |  | 28,618,454 |  |  |
Beginning balance at Dec. 31, 2017 | $ 14,087,342 | $ 28,996 | $ 136,033,967 | $ (120,579,062) | $ (1,396,559)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss | (1,408,024) |  |  | (1,408,024) |
Stock-based compensation | 377,847 |  | 377,847 |  |
Stock issued for vested restricted stock awards (in shares) |  | 178,744 |  |  |
Stock issued for vested restricted stock awards |  | $ 178 | (178) |  |
Ending balance (in shares) at Mar. 31, 2018 |  | 28,797,198 |  |  |
Ending balance at Mar. 31, 2018 | 13,057,165 | $ 29,174 | 136,411,636 | (121,987,086) | (1,396,559)
Beginning balance (in shares) at Dec. 31, 2017 |  | 28,618,454 |  |  |
Beginning balance at Dec. 31, 2017 | 14,087,342 | $ 28,996 | 136,033,967 | (120,579,062) | (1,396,559)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss | (3,682,371) |  |  |  |
Ending balance (in shares) at Sep. 30, 2018 |  | 32,433,675 |  |  |
Ending balance at Sep. 30, 2018 | 13,154,403 | $ 32,811 | 138,779,584 | (124,261,433) | (1,396,559)
Beginning balance (in shares) at Mar. 31, 2018 |  | 28,797,198 |  |  |
Beginning balance at Mar. 31, 2018 | 13,057,165 | $ 29,174 | 136,411,636 | (121,987,086) | (1,396,559)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss | (832,697) |  |  | (832,697) |
Stock-based compensation | 289,950 |  | 289,950 |  |
Shares withheld for taxes on vest restricted stock | (1,702) |  | (1,702) |  |
Stock issued for vested restricted stock awards (in shares) |  | 40,406 |  |  |
Stock issued for vested restricted stock awards |  | $ 40 | (40) |  |
Capital Raise, net (in shares) |  | 3,289,000 |  |  |
Capital Raise, net | 2,063,333 | $ 3,289 | 2,060,044 |  |
Ending balance (in shares) at Jun. 30, 2018 |  | 32,126,604 |  |  |
Ending balance at Jun. 30, 2018 | 14,576,049 | $ 32,503 | 138,759,888 | (122,819,783) | (1,396,559)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss | (1,441,650) |  |  | (1,441,650) |
Stock-based compensation | 159,799 |  | 159,799 |  |
Shares withheld for taxes on vest restricted stock | (139,795) |  | (139,795) |  |
Stock issued for vested restricted stock awards (in shares) |  | 307,071 |  |  |
Stock issued for vested restricted stock awards |  | $ 308 | (308) |  |
Ending balance (in shares) at Sep. 30, 2018 |  | 32,433,675 |  |  |
Ending balance at Sep. 30, 2018 | 13,154,403 | $ 32,811 | 138,779,584 | (124,261,433) | (1,396,559)
Beginning balance (in shares) at Dec. 31, 2018 |  | 32,381,290 |  |  |
Beginning balance at Dec. 31, 2018 | 11,033,815 | $ 32,759 | 138,867,509 | (126,469,894) | (1,396,559)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss | (2,462,393) |  |  | (2,462,393) |
Stock-based compensation | 96,871 |  | 96,871 |  |
Stock issued for vested restricted stock awards (in shares) |  | 186,031 |  |  |
Stock issued for vested restricted stock awards |  | $ 186 | (186) |  |
Ending balance (in shares) at Mar. 31, 2019 |  | 32,567,321 |  |  |
Ending balance at Mar. 31, 2019 | 8,668,293 | $ 32,945 | 138,964,194 | (128,932,287) | (1,396,559)
Beginning balance (in shares) at Dec. 31, 2018 |  | 32,381,290 |  |  |
Beginning balance at Dec. 31, 2018 | 11,033,815 | $ 32,759 | 138,867,509 | (126,469,894) | (1,396,559)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss | (3,629,486) |  |  |  |
Ending balance (in shares) at Sep. 30, 2019 |  | 48,959,219 |  |  |
Ending balance at Sep. 30, 2019 | 12,367,518 | $ 49,336 | 143,814,121 | (130,099,380) | (1,396,559)
Beginning balance (in shares) at Mar. 31, 2019 |  | 32,567,321 |  |  |
Beginning balance at Mar. 31, 2019 | 8,668,293 | $ 32,945 | 138,964,194 | (128,932,287) | (1,396,559)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss | (1,954,993) |  |  | (1,954,993) |
Stock-based compensation | 49,822 |  | 49,822 |  |
Shares withheld for taxes on vest restricted stock | (9,045) |  | (9,045) |  |
Stock issued for vested restricted stock awards (in shares) |  | 47,213 |  |  |
Stock issued for vested restricted stock awards |  | $ 47 | (47) |  |
Ending balance (in shares) at Jun. 30, 2019 |  | 32,614,534 |  |  |
Ending balance at Jun. 30, 2019 | 6,754,077 | $ 32,992 | 139,004,924 | (130,887,280) | (1,396,559)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss | 787,900 |  |  | 787,900 |
Stock-based compensation | 447,937 |  | 447,937 |  |
Shares withheld for taxes on vest restricted stock | (36,522) |  | (36,522) |  |
Stock issued for vested restricted stock awards (in shares) |  | 532,185 |  |  |
Stock issued for vested restricted stock awards |  | $ 531 | (531) |  |
Capital Raise, net (in shares) |  | 15,812,500 |  |  |
Capital Raise, net | 4,414,126 | $ 15,813 | 4,398,313 |  |
Ending balance (in shares) at Sep. 30, 2019 |  | 48,959,219 |  |  |
Ending balance at Sep. 30, 2019 | $ 12,367,518 | $ 49,336 | $ 143,814,121 | $ (130,099,380) | $ (1,396,559)

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