NOTES PAYABLE AND LONG-TERM DEBT - Narrative (Details)	3 Months Ended
Sep. 30, 2017 USD ($)
Performance bonds
Line of Credit Facility [Line Items]
Performance bonds outstanding, financial assurance	$ 600,000.0
Term Loan
Line of Credit Facility [Line Items]
Maturity period	5 years
Interest rate	3.75%
Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 14,000,000.0
Percentage of eligible accounts receivable considered for borrowing base	80.00%
Percentage of eligible inventory considered for borrowing base	50.00%
Borrowing base, monetary benchmark	$ 3,000,000
Basis spread of variable rate	0.00%
Unused capacity, commitment fee percentage	0.25%
Remaining borrowing capacity	$ 11,600,000
Credit Agreement \| Minimum
Line of Credit Facility [Line Items]
Debt service coverage ratio	1.15
Credit Agreement \| Maximum
Line of Credit Facility [Line Items]
Debt cash flow leverage ratio	3.50
Debt cash flow of leverage ratio as on December 31, 2017	3.25
Decrease in cash flow of leverage ratio as on March 31, 2018	3.0
Credit Agreement \| Working Capital
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 6,000,000.0
Remaining borrowing capacity	6,000,000
Credit Agreement \| Letter of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	2,000,000.0
Amount outstanding	10,000
Credit Agreement \| Acquisitions
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 8,000,000.0
Percentage of portion allocated to acquisition purchase price	75.00%
Remaining borrowing capacity	$ 5,600,000
Credit Agreement \| LIBOR
Line of Credit Facility [Line Items]
Basis spread of variable rate	2.50%
Debt instrument, term of variable rate	1 month
Credit Agreement \| LIBOR \| Maximum
Line of Credit Facility [Line Items]
Basis spread of variable rate	3.00%

Borrowing Base, Monetary Benchmark For Percentage Of Eligible Accounts

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Ratio used to determine cash flows leverage tiers of the company.

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Ratio used to determine cash flows leverage tiers of the company as on December 31, 2017.

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Ratio used to determine cash flows leverage tiers of the company as on period 2.

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Term of interest rate that fluctuates over time as a result of an underlying benchmark interest rate or index.

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Ratio used by bank loan officers in determining income property loans.

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Percentage of eligible accounts receivable considered for borrowing base as defined in the credit agreement.

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Percentage of eligible inventory considered for borrowing base as defined in the credit agreement.

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Maximum borrowing limit percentage under line of credit facility as per the terms of the credit agreement.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

The effective interest rate at the end of the reporting period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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No definition available.

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