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LONG-TERM OBLIGATIONS (Detail Textuals) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Nov. 30, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Jun. 22, 2016 | Jun. 11, 2015
First Tennessee Bank National Association | Revolving Credit Facility |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Revolving credit facility |  |  |  | $ 50,000 | $ 30,000
Description of reference rate basis |  | LIBOR Rate |  |  |
Variable interest rate in addition to reference rate |  | 1.50% |  |  |
Interest expense on credit facility |  | $ 492 | $ 341 |  |
Outstanding borrowings credit facility |  | $ 10,000 | $ 5,000 |  |
Interest rate |  | 3.07% |  |  |
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 | Maximum |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Non-usage fee for current loan agreement in annual amount percentage |  | 0.35% |  |  |
Jige International S.A. | Banque Europeenne du Credit Mutuel |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Unsecured fixed rate loan | $ 1,000 |  |  |  |
Maturity date | Sep. 30, 2020 |  |  |  |
Interest rate per annum | 0.30% |  |  |  |
Outstanding borrowings under loan agreement |  | $ 606 |  |  |
Long-term debt |  | 212 |  |  |
Long-term obligations |  | $ 394 |  |  |

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