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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, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based Payment Arrangement, Expense | $ 670 | $ 710 | $ 2,370 | $ 2,500 |
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) |  |  | $ 3.43 | $ 3.84 | $ 3.84
Grants in period, weighted average exercise price (in dollars per share) |  |  | 1.77 |  | 2.92
Exercises in period, weighted average exercise price (in dollars per share) |  |  | 0 |  | 2.27
Forfeitures in period, weighted average exercise price (in dollars per share) |  |  | 2.51 |  | 3.94
Expirations in period, weighted average exercise price (in dollars per share) |  |  | 4.40 |  | 6.97
Weighted average exercise price, end of period (in dollars per share) | $ 2.83 |  | $ 2.83 |  | $ 3.43
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |  |
Number of options, beginning of period (in shares) |  |  | 1,487,433 | 1,732,754 | 1,732,754
Number of grants in period, net of forfeitures (in shares) |  |  | 706,774 |  | 296,450
Number of exercises in period (in shares) |  |  | 0 |  | (54,805)
Number of forfeitures in period (in shares) |  |  | (106,176) |  | (342,866)
Number of expirations in period (in shares) |  |  | (98,512) |  | (144,100)
Number of options, end of period (in shares) | 1,989,519 |  | 1,989,519 |  | 1,487,433
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 | $ 1.70 | $ 1.70
Grants in period, weighted average exercise price (in dollars per share) |  |  | 1.76 |  |
Exercises in period, weighted average exercise price (in dollars per share) |  |  |  |  | 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) |  |  | 4.12 |  |
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) |  |  | 1.79 |  |
Exercises in period, weighted average exercise price (in dollars per share) |  |  |  |  | 2.92
Forfeitures in period, weighted average exercise price (in dollars per share) |  |  | 5.18 |  | 7.42
Expirations in period, weighted average exercise price (in dollars per share) |  |  | 5.22 |  |
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) |  |  | 223,381 |  |
Granted, nonvested, number of shares (in shares) |  |  | 706,774 |  |
Vested, number of shares (in shares) |  |  | (506,310) |  |
Nonvested options forfeited, number of shares (in shares) |  |  | (22,176) |  |
Number of nonvested shares, end of period (in shares) | 401,669 |  | 401,669 |  | 223,381
Weighted Average Grant Date Fair Value |  |  |  |  |
Nonvested, weighted average grant date fair value, beginning of period (in dollars per share) |  |  | $ 1.32 |  |
Granted, nonvested, weighted average grant date fair value (in dollars per share) |  |  | 0.82 |  |
Vested, weighted average grant date fair value (in dollars per share) |  |  | 0.94 |  |
Nonvested options forfeited, weighted average grant date fair value (in dollars per share) |  |  | 1.96 |  |
Nonvested, weighted average grant date fair value, end of period (in dollars per share) | $ 0.94 |  | $ 0.94 |  | $ 1.32

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