LONG-TERM DEBT (Details) - USD ($)				3 Months Ended
	Jul. 31, 2017	May 22, 2017	May 03, 2016	Mar. 31, 2018	May 21, 2017	Dec. 19, 2016	Jul. 01, 2016	Jan. 11, 2016	Jan. 10, 2016	Dec. 24, 2014	Dec. 19, 2014
Credit facility
Long-term debt
Borrowings				$ 0
PSE&G
Long-term debt
Stated interest rate										11.30%
Outstanding debt				2,300,000
One Communications Debt
Long-term debt
Maximum borrowing capacity		$ 37,500,000
Term loan assumed			$ 35,400,000
Outstanding debt				34,700,000
Unamortized financing costs				300,000
Financing costs		$ 300,000
One Communications Debt | Three month LIBOR
Long-term debt
Basis spread on variable rate (as a percent)			3.25%
One Communications Debt | Minimum | Three month LIBOR
Long-term debt
Basis spread on variable rate (as a percent)		2.50%
One Communications Debt | Maximum
Long-term debt
Period to enter into hedging arrangement		90 days
One Communications Debt | Maximum | Three month LIBOR
Long-term debt
Basis spread on variable rate (as a percent)		2.75%
One Communications Debt | Overdraft Facility
Long-term debt
Maximum borrowing capacity		$ 10,000,000			$ 5,000,000
Borrowings				$ 0
One Communications Debt | Overdraft Facility | LIBOR
Long-term debt
Basis spread on variable rate (as a percent)				1.75%
One Communications Debt | Overdraft Facility | Minimum
Long-term debt
Percentage of notional amount required for hedging arrangement		30.00%
Viya Debt
Long-term debt
Term loan assumed							$ 60,000,000
Net Leverage Ratio maximum amount of cash							$ 50,000,000
Stated interest rate							4.00%
Outstanding debt				$ 60,000,000
Unamortized financing costs				$ 700,000
Financing costs							$ 900,000
Revolver loan | Credit facility
Long-term debt
Maximum borrowing capacity								$ 400,000,000	$ 275,000,000		$ 225,000,000
Revolver loan | Credit facility | Minimum
Long-term debt
Commitment fee (as a percent)				0.175%
Revolver loan | Credit facility | Minimum | LIBOR
Long-term debt
Basis spread on variable rate (as a percent)				1.50%
Revolver loan | Credit facility | Minimum | Base rate
Long-term debt
Basis spread on variable rate (as a percent)				0.50%
Revolver loan | Credit facility | Maximum
Long-term debt
Commitment fee (as a percent)				0.25%
Revolver loan | Credit facility | Maximum | LIBOR
Long-term debt
Basis spread on variable rate (as a percent)				1.75%
Revolver loan | Credit facility | Maximum | Base rate
Long-term debt
Basis spread on variable rate (as a percent)				0.75%
Letter of credit sub-facility | Credit facility
Long-term debt
Maximum borrowing capacity											10,000,000
Letter of credit sub-facility | Credit facility | Mobility Funds
Long-term debt
Maximum borrowing capacity											25,000,000
Swingline sub-facility | Credit facility
Long-term debt
Maximum borrowing capacity											$ 10,000,000
Swingline sub-facility | Credit facility | Federal Funds Effective Rate
Long-term debt
Basis spread on variable rate (as a percent)				0.50%
Swingline sub-facility | Credit facility | Minimum | Base rate
Long-term debt
Basis spread on variable rate (as a percent)				1.00%
Term loans | Credit facility
Long-term debt
Maximum borrowing capacity								$ 200,000,000
Term loans | Ahana Debt
Long-term debt
Term loan assumed										$ 38,900,000
Term loans | Ahana Debt | Minimum
Long-term debt
Effective interest rate (as a percent)										4.50%
Term loans | Ahana Debt | Maximum
Long-term debt
Effective interest rate (as a percent)										6.00%
Ahana Operations | Series A Notes
Long-term debt
Secured debt principal amount						$ 20,600,000
Stated interest rate						4.427%
Ahana Operations | Series B Notes
Long-term debt
Secured debt principal amount						$ 45,200,000
Stated interest rate						5.327%
Ahana Operations | Series A and Series B Notes
Long-term debt
Outstanding debt				$ 61,500,000
Unamortized financing costs				2,600,000
Financing costs				$ 2,800,000
Cash flow hedge | Interest rate swap
Long-term debt
Notional amount	$ 11,000,000
Interest expenses	$ 1.874