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LONG-TERM OBLIGATIONS (Details) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Dec. 20, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 19, 2018
Line of Credit Facility [Line Items] |  |  |  |  |
Long-term debt |  | $ 368 | $ 285 |  |
First Tennessee Bank National Association | Revolving Credit Facility |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Revolving credit facility | $ 50,000 |  |  |  |
Debt Instrument, Description Of Variable Rate Basis | one month LIBOR rate plus 150 basis points | one month LIBOR rate plus an applicable margin of either 1.00% or 1.25% depending on the Company's Leverage Ratio (as such term is defined in the amended and restated master revolving credit note), which margin adjusts periodically from time to time based on changes in such Leverage Ratio, and make certain other changes to the interest rate provisions |  |  |
Interest expense on credit facility |  | $ 684 | 512 | $ 492 |
Outstanding borrowings credit facility |  | 4,998 | 15,000 |  |
Minimum tangible net worth required for compliance | $ 160,000 |  |  |  | $ 130,000
Tangible net worth |  | $ 246,000 |  |  |
First Tennessee Bank National Association | Revolving Credit Facility | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Variable interest rate in addition to reference rate | 1.50% |  |  |  |
Interest rate |  | 2.76% |  |  |
First Tennessee Bank National Association | Revolving Credit Facility | Minimum |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Non-usage fee for current loan agreement in annual amount percentage |  | 0.15% |  |  |
First Tennessee Bank National Association | Revolving Credit Facility | Minimum | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Variable interest rate in addition to reference rate | 1.00% | 1.00% |  |  |
First Tennessee Bank National Association | Revolving Credit Facility | Maximum |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Non-usage fee for current loan agreement in annual amount percentage |  | 0.35% |  |  |
First Tennessee Bank National Association | Revolving Credit Facility | Maximum | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Variable interest rate in addition to reference rate | 1.25% | 1.25% |  |  |
Jige International S.A. | Banque Europeenne du Credit Mutuel |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Unsecured fixed rate loan |  |  | 760 |  |
Interest rate per annum |  | 0.30% |  |  |
Unsecured debt, long-term obligations |  |  | 475 |  |
Unsecured debt, long-term obligations due within one year |  | $ 368 | $ 285 |  |

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