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SHARE-BASED PAYMENTS - Schedule of Share-based Compensation, Stock Options, Activity (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Allocated Share-based Compensation Expense | $ 710 | $ 520 | $ 2,500 | $ 2,240 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] |  |  |  |  |
Weighted average exercise price, beginning of period (in dollars per share) |  |  | $ 3.84 | $ 4.48 | $ 4.48
Grants in period, weighted average exercise price (in dollars per share) |  |  | 2.92 |  | 1.75
Exercises in period, weighted average exercise price (in dollars per share) |  |  | 2.27 |  | 2.15
Forfeitures in period, weighted average exercise price (in dollars per share) |  |  | 4.41 |  | 3.96
Expirations in period, weighted average exercise price (in dollars per share) |  |  | 6.83 |  | 8.18
Weighted average exercise price, end of period (in dollars per share) | $ 3.43 |  | $ 3.43 |  | $ 3.84
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |  |
Number of options, beginning of period (in shares) |  |  | 1,732,754 | 2,028,847 | 2,028,847
Number of grants in period, net of forfeitures (in shares) |  |  | 296,450 |  | 442,956
Number of exercises in period (in shares) |  |  | (54,805) |  | (355,092)
Number of forfeitures in period (in shares) |  |  | (337,766) |  | (213,393)
Number of expirations in period (in shares) |  |  | (144,100) |  | (170,564)
Number of options, end of period (in shares) | 1,492,533 |  | 1,492,533 |  | 1,732,754
Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] |  |  |  |  |
Weighted average exercise price, beginning of period (in dollars per share) |  |  | $ 1.70 | $ 1.77 | $ 1.77
Grants in period, weighted average exercise price (in dollars per share) |  |  |  |  | 1.70
Exercises in period, weighted average exercise price (in dollars per share) |  |  | 1.70 |  | 1.70
Forfeitures in period, weighted average exercise price (in dollars per share) |  |  | 1.70 |  | 1.70
Expirations in period, weighted average exercise price (in dollars per share) |  |  |  |  | 5.86
Weighted average exercise price, end of period (in dollars per share) | $ 1.70 |  | 1.70 |  | 1.70
Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] |  |  |  |  |
Weighted average exercise price, beginning of period (in dollars per share) |  |  | 15.61 | $ 15.61 | 15.61
Grants in period, weighted average exercise price (in dollars per share) |  |  |  |  | 2.88
Exercises in period, weighted average exercise price (in dollars per share) |  |  | 2.92 |  | 2.55
Forfeitures in period, weighted average exercise price (in dollars per share) |  |  | 7.42 |  | 6.63
Expirations in period, weighted average exercise price (in dollars per share) |  |  |  |  | 10.36
Weighted average exercise price, end of period (in dollars per share) | $ 15.61 |  | $ 15.61 |  | $ 15.61
Equity Option |  |  |  |  |
Number of shares |  |  |  |  |
Number of nonvested shares, beginning of period (in shares) |  |  | 297,044 |  |
Granted, nonvested, number of shares (in shares) |  |  | 296,450.00 |  |
Vested, number of shares (in shares) |  |  | (345,921) |  |
Nonvested options forfeited, number of shares (in shares) |  |  | (22,551) |  |
Number of nonvested shares, end of period (in shares) | 225,022 |  | 225,022 |  | 297,044
Weighted Average Grant-Date Fair Value |  |  |  |  |
Nonvested, weighted average grant date fair value, beginning of period (in dollars per share) |  |  | $ 1.06 |  |
Granted, nonvested, weighted average grant date fair value (in dollars per share) |  |  | 1.54 |  |
Vested, weighted average grant date fair value (in dollars per share) |  |  | 1.28 |  |
Nonvested options forfeited, weighted average grant date fair value (in dollars per share) |  |  | 1.47 |  |
Nonvested, weighted average grant date fair value, end of period (in dollars per share) | $ 1.31 |  | $ 1.31 |  | $ 1.06

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