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LONG TERM DEBT - NARRATIVE (Details) - Mortgages | Jun. 28, 2016 USD ($) | Dec. 31, 2016
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Debt Instrument [Line Items] |  |
Mortgage loan, principal amount | $ 3,592,000 |
Certificate of deposit, amount pledged as collateral | 779,000 |
Fixed monthly principal payment | 19,956 |
Effective interest rate (as a percent) |  | 4.272%
Debt covenant, maximum liquidity | $ 750,000 |
Debt service coverage ratio for preceding four quarters for extension of loan | 1.0 |
London Interbank Offered Rate (LIBOR) |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate (as a percent) | 3.50% |
Secured Debt |  |
Debt Instrument [Line Items] |  |
Maximum working capital accounts | $ 2,000,000 |

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