STOCK BASED COMPENSATION PLANS - Summary of Information Related to Options (Details) - $ / shares	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
$1.62 to $1.68
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding	75,000
Options Exercisable	50,001
Options Exercisable, Remaining Contractual Life	4 years 6 months 4 days
Options Exercisable, Weighted Average Exercise Price	$ 1.65
$1.80 to $2.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding	295,555
Options Exercisable	245,555
Options Exercisable, Remaining Contractual Life	4 years 1 month 28 days
Options Exercisable, Weighted Average Exercise Price	$ 1.80
$2.05
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding	100,000
Options Exercisable	100,000
Options Exercisable, Remaining Contractual Life	3 years 11 months 19 days
Options Exercisable, Weighted Average Exercise Price	$ 2.05
$2.09
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding	10,000
Options Exercisable	6,666
Options Exercisable, Remaining Contractual Life	4 years 6 months 29 days
Options Exercisable, Weighted Average Exercise Price	$ 2.09
$2.75
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding	25,000
Options Exercisable	16,666
Options Exercisable, Remaining Contractual Life	4 years 9 months 7 days
Options Exercisable, Weighted Average Exercise Price	$ 2.75
$2.94
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding	75,000
Options Exercisable	25,000
Options Exercisable, Remaining Contractual Life	5 years 6 months 11 days
Options Exercisable, Weighted Average Exercise Price	$ 2.94
$3.38
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding	29,585
Options Exercisable	29,586
Options Exercisable, Remaining Contractual Life	5 years 22 days
Options Exercisable, Weighted Average Exercise Price	$ 3.38
$4.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	$ 4.00
Options, Outstanding	75,000
Options Exercisable, Remaining Contractual Life	6 years 8 months 9 days
$4.05
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	$ 4.05
Options, Outstanding	30,000
Options Exercisable	10,000
Options Exercisable, Remaining Contractual Life	6 years 7 months 10 days
Options Exercisable, Weighted Average Exercise Price	$ 4.05
$4.40
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	$ 4.40
Options, Outstanding	178,000
Options Exercisable, Remaining Contractual Life	6 years 9 months 11 days
$4.98
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	$ 4.98
Options, Outstanding	20,080
Options Exercisable, Remaining Contractual Life	6 years 2 months 1 day
Stock options
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding	913,220	610,141	538,888	120,000
Options Outstanding, Remaining Contractual Life	5 years 2 months 5 days	5 years 5 months 1 day	6 years 2 months 16 days
Options Exercisable	483,474	298,893	33,335
Options Exercisable, Remaining Contractual Life	4 years 4 months 10 days	5 years 2 months 1 day	5 years 11 months 19 days
Options Exercisable, Weighted Average Exercise Price	$ 2.08	$ 1.87	$ 2.05
Stock options | $1.62 to $1.68 | Minimum
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	1.62
Stock options | $1.62 to $1.68 | Maximum
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	1.68
Stock options | $1.80 to $2.00 | Minimum
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	1.80
Stock options | $1.80 to $2.00 | Maximum
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	2.00
Stock options | $2.05
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	2.05
Stock options | $2.09
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	2.09
Stock options | $2.75
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	2.75
Stock options | $2.94
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	2.94
Stock options | $3.38
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices	$ 3.38