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EMPLOYEE STOCK COMPENSATION - Summary of Stock Options Outstanding (Details) | 12 Months Ended
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Dec. 31, 2017 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options Outstanding, Number of Shares (in shares) | shares | 210,973
Options Outstanding, Intrinsic Value | $ | $ 1,404,705
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) | $ 13.99
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) | 6 years 11 months 17 days
Options Exercisable, Number of Shares (in shares) | shares | 105,541
Options Exercisable, Intrinsic Value | $ | $ 630,593
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) | $ 14.68
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) | 6 years 7 months 22 days
$10.89 to $12.21 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise price (in usd per share) | $ 10.89
Upper range of exercise price (in usd per share) | $ 12.21
Options Outstanding, Number of Shares (in shares) | shares | 7,344
Options Outstanding, Intrinsic Value | $ | $ 71,604
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) | $ 10.90
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) | 6 years 5 months 30 days
Options Exercisable, Number of Shares (in shares) | shares | 4,400
Options Exercisable, Intrinsic Value | $ | $ 42,900
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) | $ 10.90
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) | 6 years 5 months 30 days
$12.21 to $13.53 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise price (in usd per share) | $ 12.21
Upper range of exercise price (in usd per share) | $ 13.53
Options Outstanding, Number of Shares (in shares) | shares | 116,000
Options Outstanding, Intrinsic Value | $ | $ 853,760
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) | $ 13.29
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) | 7 years 4 months 14 days
Options Exercisable, Number of Shares (in shares) | shares | 32,000
Options Exercisable, Intrinsic Value | $ | $ 235,520
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) | $ 13.29
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) | 7 years 4 months 14 days
$13.53 to $14.85 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise price (in usd per share) | $ 13.53
Upper range of exercise price (in usd per share) | $ 14.85
Options Outstanding, Number of Shares (in shares) | shares | 47,464
Options Outstanding, Intrinsic Value | $ | $ 325,502
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) | $ 13.79
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) | 6 years 6 months 28 days
Options Exercisable, Number of Shares (in shares) | shares | 28,976
Options Exercisable, Intrinsic Value | $ | $ 198,334
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) | $ 13.81
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) | 6 years 3 months 14 days
$14.85 to $16.17 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise price (in usd per share) | $ 14.85
Upper range of exercise price (in usd per share) | $ 16.17
Options Outstanding, Number of Shares (in shares) | shares | 16,165
Options Outstanding, Intrinsic Value | $ | $ 78,239
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) | $ 15.81
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) | 3 years 5 months 26 days
Options Exercisable, Number of Shares (in shares) | shares | 16,165
Options Exercisable, Intrinsic Value | $ | $ 78,239
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) | $ 15.81
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) | 3 years 5 months 26 days
$16.17 to $17.50 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Lower range of exercise price (in usd per share) | $ 16.17
Upper range of exercise price (in usd per share) | $ 17.50
Options Outstanding, Number of Shares (in shares) | shares | 24,000
Options Outstanding, Intrinsic Value | $ | $ 75,600
Options Outstanding, Weighted- Average Exercise Price per Share (in dollars per share) | $ 17.50
Options Outstanding, Weighted- Average Remaining Contractual Life (in years) | 8 years 2 months 30 days
Options Exercisable, Number of Shares (in shares) | shares | 24,000
Options Exercisable, Intrinsic Value | $ | $ 75,600
Options Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) | $ 17.50
Options Exercisable, Weighted-Average Remaining Contractual Life (in years) | 8 years 2 months 30 days

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