REVOLVING CREDIT FACILITY (Details) - Senior Loan Facility - USD ($)
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6 Months Ended |
12 Months Ended |
Nov. 06, 2014 |
Jun. 30, 2017 |
Dec. 31, 2016 |
| Letter of Credit |
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| Line of Credit Facility [Line Items] |
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| Letters of credit outstanding |
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$ 0
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$ 0
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| Revolving Credit Facility |
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| Line of Credit Facility [Line Items] |
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| Maximum borrowing capacity |
$ 20,000,000
|
5,000,000
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| Maximum borrowing capacity by collateral restrictions |
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3,021,000
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| Borrowings under revolving credit facility |
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$ 2,867,000
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$ 5,844,000
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| Ending interest rate |
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4.30%
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4.00%
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| Line of credit commitment fee percentage (as percent) |
3.00%
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| Line of credit facility, benchmark subject to minimum monthly EBITDA requirements |
$ 5,000,000
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| Revolving Credit Facility | State of Alaska |
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| Line of Credit Facility [Line Items] |
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| Line of credit facility, monthly EBITDA requirements |
8,000,000
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| Revolving Credit Facility | Maximum |
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| Line of Credit Facility [Line Items] |
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| Line of credit facility, monthly EBITDA requirements |
20,000,000
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| Revolving Credit Facility | Borrowing base availability |
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| Line of Credit Facility [Line Items] |
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| Concentration risk, benchmark |
$ 20,000,000
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| Revolving Credit Facility | Borrowing base availability | Accounts receivable |
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| Line of Credit Facility [Line Items] |
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| Concentration risk, percentage |
85.00%
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| Revolving Credit Facility | Borrowing base availability | Equipment |
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| Line of Credit Facility [Line Items] |
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| Concentration risk, percentage |
85.00%
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| Revolving Credit Facility | Borrowing base availability | Equipment | State of Alaska |
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| Line of Credit Facility [Line Items] |
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| Concentration risk, percentage |
75.00%
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| Revolving Credit Facility | LIBOR |
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| Line of Credit Facility [Line Items] |
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| Description of variable rate basis |
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three month LIBOR
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| Basis spread on variable rate |
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3.00%
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| Revolving Credit Facility | Accordion Feature |
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| Line of Credit Facility [Line Items] |
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| Maximum borrowing capacity |
$ 10,000,000
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| Line of credit facility, minimum increments |
1,000,000
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| Revolving Credit Facility | Sub-Facility |
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| Line of Credit Facility [Line Items] |
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| Maximum borrowing capacity |
$ 10,000,000
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| Revolving Credit Facility | Letter of Credit |
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| Line of Credit Facility [Line Items] |
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| Line of credit commitment fee percentage (as percent) |
0.50%
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