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STOCK OPTIONS - NARRATIVE (Details) - USD ($) | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Jul. 31, 2015 | Jul. 31, 2012 | Oct. 30, 2007 | Dec. 31, 2001
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Option expiration period (in years) | 10 years |  |  |  |  |  |
Option vesting period (in years) | 7 years |  |  |  |  |  |
Aggregate intrinsic value of all stock options outstanding and expected to vest | $ 4,150,334 | $ 102,992 |  |  |  |  |
Aggregate intrinsic value of currently exercisable stock options | $ 1,574,318 | $ 11,250 |  |  |  |  |
Closing stock price for computation of intrinsic value (in dollars per share) | $ 3.59 | $ 2.10 |  |  |  |  |
Number of in-the-money options outstanding and exercisable | 1,211,014 | 410,715 |  |  |  |  |
Intrinsic value of options exercised | $ 119,026 | $ 51,575 | $ 229,135 |  |  |  |
Proceeds from stock options exercised | 12,300 | 209,250 | 87,475 |  |  |  |
Intrinsic value of options granted | 1,516,125 | 932,771 | 1,107,180 |  |  |  |
Fair value of option shares vested | $ 612,464 | $ 412,638 | $ 637,000 |  |  |  |
Shares issued in stock swaps | 9,614 | 33,520 | 73,699 |  |  |  |
Value of stock swaps, net | $ 12,300 |  | $ 80,475 |  |  |  |
Unrecognized stock-based compensation cost | $ 1,200,000 |  |  |  |  |  |
Unrecognized stock-based compensation cost, recognition period (in years) | 4 years |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares received in stock swaps | 26,636 | 80,980 | 33,301 |  |  |  |
Stock Option |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares received in stock swaps | 36,250 | 114,500 | 107,000 |  |  |  |
2001 Executive and Employee Stock Option Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares authorized under common stock option plans |  |  |  |  |  |  | 1,200,000
2003 Executive and Employee Stock Option Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares authorized under common stock option plans |  |  |  |  |  | 1,700,000 |
2012 Share Incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares authorized under common stock option plans |  |  |  |  | 750,000 |  |
Remaining shares for issuance (in shares) | 37,000 |  |  |  |  |  |
2015 Executive and Employee Stock Option Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares authorized under common stock option plans |  |  |  | 2,000,000 |  |  |
Remaining shares for issuance (in shares) | 693,078 |  |  |  |  |  |

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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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