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Consolidated Statements of Changes in Stockholders' Equity - USD ($) | Common Stock | Treasury Shares | Additional Paid-in Capital | Retained Earnings (Accumulated Deficit) | Total
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2017 | $ 6,882 |  | $ 18,346,914 | $ (923,074) | $ 17,430,722
Balance, shares at Dec. 31, 2017 | 6,881,794 |  |  |  |
Stock-based compensation expense for restricted stock awards and stock options |  |  | 1,592,121 |  | 1,592,121
Reconciliation of shares issued in stock-based compensation arrangement | $ 1 |  |  |  | 1
Reconciliation of shares issued in stock-based compensation arrangement, shares | 522 |  |  |  |
Issuance of common stock for consulting services | $ 6 |  | 28,204 |  | 28,210
Issuance of common stock for consulting services, shares | 6,363 |  |  |  |
Surrender of common stock for tax withholding | $ (20) |  | (99,980) |  | (100,000)
Surrender of common stock for tax withholding, shares | (20,000) |  |  |  |
Net loss |  |  |  | (3,797,217) | (3,797,217)
Balance at Dec. 31, 2018 | $ 6,869 |  | 19,867,259 | (4,720,291) | 15,153,837
Balance, shares at Dec. 31, 2018 | 6,868,679 |  |  |  |
Stock-based compensation expense for restricted stock awards and stock options |  |  | 1,385,118 |  | 1,385,118
Issuance of common stock for consulting services | $ 10 |  | 29,005 |  | 29,015
Issuance of common stock for consulting services, shares | 10,225 |  |  |  |
Repurchased of common stock |  | $ (2,015) |  |  | (2,015)
Repurchased of common stock, shares |  | (1,900) |  |  |
Net loss |  |  |  | (8,380,060) | (8,380,060)
Balance at Dec. 31, 2019 | $ 6,879 | $ (2,015) | $ 21,281,382 | $ (13,100,351) | $ 8,185,895
Balance, shares at Dec. 31, 2019 | 6,878,904 | (1,900) |  |  |

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