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COMMITMENTS AND CONTINGENCIES - Life Insurance and Control Agreements (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Share Repurchase Program |  |
Stock repurchased | $ 276 | $ 30
Restructuring Charges [Abstract] |  |
Accrued payroll and commissions | 2,747 | 2,900
Matt Mahmood |  |
Restructuring Charges [Abstract] |  |
Expense related to separation payments | 235 |
Accrued payroll and commissions | $ 177 |
August 2017 repurchase program |  |
Share Repurchase Program |  |
Share repurchase program authorized amount |  | $ 250
Stock repurchased (in shares) | 55,199 | 8,581
Stock repurchased | $ 201 | $ 30
Authorized balance remaining under share repurchase program | 0 | 220
August 2018 repurchase program |  |
Share Repurchase Program |  |
Share repurchase program authorized amount | $ 250 |
Stock repurchased (in shares) | 21,002 |
Stock repurchased | $ 81 |
Maximum |  |
Commitment and contingencies |  |
Professional outplacement services that would be received by the participants | $ 10 |
2002 Plan |  |
Commitment and contingencies |  |
Period of graded vesting schedule | 5 years |
Annual vesting by the participants (as a percent) | 20.00% |
Expenses incurred | $ 0 | $ 207
2002 Plan | Officer participants |  |
Commitment and contingencies |  |
Bonus to be paid as a percentage of the participants base annual salary | 15.00% |
2002 Plan | Other participants |  |
Commitment and contingencies |  |
Bonus to be paid as a percentage of the participants base annual salary | 10.00% |
Agreement(s) | Officer participants |  |
Commitment and contingencies |  |
Period of continued participation in health, disability and life insurance plans after involuntary termination | 3 years |
Agreement(s) | Other participants |  |
Commitment and contingencies |  |
Period of continued participation in health, disability and life insurance plans after involuntary termination | 2 years |

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