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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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount of labor-related expenses classified as other.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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