DEBT - Summary of Interest Rates (Details) - Revolving credit facility	6 Months Ended
	Dec. 31, 2017 USD ($)
$18 Million Revolver
Debt Instrument [Line Items]
Credit facility	$ 18,000,000
$45 Million Revolver
Debt Instrument [Line Items]
Credit facility	45,000,000
$46 Million Revolver
Debt Instrument [Line Items]
Credit facility	46,000,000
$48 Million Revolver
Debt Instrument [Line Items]
Credit facility	48,000,000
$69 Million Revolver
Debt Instrument [Line Items]
Credit facility	69,000,000
$73.5 Million Revolver
Debt Instrument [Line Items]
Credit facility	73,500,000
$100 Million Revolver
Debt Instrument [Line Items]
Credit facility	$ 100,000,000
Line of credit | $18 Million Revolver
Debt Instrument [Line Items]
Interest rate percentage on revolver draws	2.99%
Line of credit | $45 Million Revolver
Debt Instrument [Line Items]
Interest rate percentage on revolver draws	3.03%
Line of credit | $46 Million Revolver
Debt Instrument [Line Items]
Interest rate percentage on revolver draws	2.98%
Line of credit | $48 Million Revolver
Debt Instrument [Line Items]
Interest rate percentage on revolver draws	3.07%
Line of credit | $69 Million Revolver
Debt Instrument [Line Items]
Interest rate percentage on revolver draws	2.87%
Line of credit | $73.5 Million Revolver
Debt Instrument [Line Items]
Interest rate percentage on revolver draws	2.87%
Line of credit | $100 Million Revolver
Debt Instrument [Line Items]
Interest rate percentage on revolver draws	2.88%