Shareholders' Equity - Changes in Shareholders’ Equity (Details) - USD ($) |
3 Months Ended | 6 Months Ended | ||||
---|---|---|---|---|---|---|
Jun. 30, 2019 |
Mar. 31, 2019 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|
Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||
Beginning balance | $ 40,585,474 | $ 42,451,169 | $ 47,826,748 | $ 42,451,169 | ||
Stock repurchased | $ (374,820) | |||||
Stock-based compensation | 580,603 | 309,563 | 73,425 | 269,596 | 890,166 | |
Stock issued | (149,180) | |||||
Net loss | (2,695,792) | (2,175,258) | (1,596,637) | (2,043,292) | (4,871,050) | $ (3,639,929) |
Ending balance | 38,619,465 | 40,585,474 | 46,303,536 | 47,826,748 | 38,619,465 | 46,303,536 |
Common Stock | ||||||
Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||
Beginning balance | 38,967 | 38,967 | 38,937 | 38,967 | ||
Stock issued | (398) | |||||
Ending balance | 39,365 | 38,967 | 38,937 | 38,937 | 39,365 | 38,937 |
Treasury Stock | ||||||
Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||
Beginning balance | (18,929,915) | (18,929,915) | (17,000,693) | (18,929,915) | ||
Stock repurchased | (374,820) | |||||
Ending balance | (18,929,915) | (18,929,915) | (17,000,693) | (17,000,693) | (18,929,915) | (17,000,693) |
Additional paid-in capital | ||||||
Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||
Beginning balance | 94,694,793 | 94,385,230 | 94,183,153 | 94,385,230 | ||
Stock-based compensation | 580,603 | 309,563 | 73,425 | 269,596 | 890,166 | |
Stock issued | (148,782) | |||||
Ending balance | 95,424,178 | 94,694,793 | 94,256,578 | 94,183,153 | 95,424,178 | 94,256,578 |
Accumulated deficit | ||||||
Increase (Decrease) in Stockholders' Equity [Roll Forward] | ||||||
Beginning balance | (35,218,371) | (33,043,113) | (29,394,649) | (33,043,113) | ||
Net loss | (2,695,792) | (2,175,258) | (1,596,637) | (2,043,292) | (4,871,050) | |
Ending balance | $ (37,914,163) | $ (35,218,371) | $ (30,991,286) | $ (29,394,649) | $ (37,914,163) | $ (30,991,286) |