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v3.19.3

Shareholders' Equity - Changes in Shareholders’ Equity (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | $ 38,619,465 | $ 40,585,474 | $ 42,451,169 | $ 46,303,536 | $ 47,826,748 | $ 49,975,264 | $ 42,451,169 | $ 49,975,264
Stock repurchased |  |  |  | (1,929,222) |  | (374,820) |  |
Stock issued | 179,410 | 149,180 |  | 4,500 |  |  |  |
Stock-based compensation | 144,180 | 580,603 | 309,563 | 70,619 | 73,425 | 269,596 | 1,034,346 |
Net loss | (1,698,384) | (2,695,792) | (2,175,258) | (1,539,495) | (1,596,637) | (2,043,292) | (6,569,434) | (5,179,424)
Ending balance | 37,244,671 | 38,619,465 | 40,585,474 | 42,909,938 | 46,303,536 | 47,826,748 | 37,244,671 | 42,909,938
Common Stock |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | 39,365 | 38,967 | 38,967 | 38,937 | 38,937 | 38,937 | 38,967 | 38,937
Stock issued | 102 | 398 |  | 30 |  |  |  |
Ending balance | 39,467 | 39,365 | 38,967 | 38,967 | 38,937 | 38,937 | 39,467 | 38,967
Treasury Stock |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | (18,929,915) | (18,929,915) | (18,929,915) | (17,000,693) | (17,000,693) | (16,625,873) | (18,929,915) | (16,625,873)
Stock repurchased |  |  |  | (1,929,222) |  | (374,820) |  |
Ending balance | (18,929,915) | (18,929,915) | (18,929,915) | (18,929,915) | (17,000,693) | (17,000,693) | (18,929,915) | (18,929,915)
Additional paid-in capital |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | 95,424,178 | 94,694,793 | 94,385,230 | 94,256,578 | 94,183,153 | 93,913,557 | 94,385,230 | 93,913,557
Stock issued | 179,308 | 148,782 |  | 4,470 |  |  |  |
Stock-based compensation | 144,180 | 580,603 | 309,563 | 70,619 | 73,425 | 269,596 | 1,034,346 |
Ending balance | 95,747,666 | 95,424,178 | 94,694,793 | 94,331,667 | 94,256,578 | 94,183,153 | 95,747,666 | 94,331,667
Accumulated deficit |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | (37,914,163) | (35,218,371) | (33,043,113) | (30,991,286) | (29,394,649) | (27,351,357) | (33,043,113) | (27,351,357)
Net loss | (1,698,384) | (2,695,792) | (2,175,258) | (1,539,495) | (1,596,637) | (2,043,292) | (6,569,434) |
Ending balance | $ (39,612,547) | $ (37,914,163) | $ (35,218,371) | $ (32,530,781) | $ (30,991,286) | $ (29,394,649) | $ (39,612,547) | $ (32,530,781)

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- Definition Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=109196918&loc=d3e11149-113907 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=109196918&loc=d3e11178-113907 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=79507207&loc=d3e4534-113899 + Details
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