SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Impact of New Accounting Guidance (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	$ 12,568	$ 10,414	$ 14,565	$ 13,599	$ 12,174	$ 9,451	$ 12,394	$ 10,293	$ 51,146	$ 44,312	$ 40,141
Cost of revenues									35,384	31,042	28,739
Gross profit	4,183	2,223	4,872	4,484	3,892	2,035	3,991	3,352	15,762	13,270	11,402
Selling, general and administrative									14,046	12,003	11,168
Operating income (loss)	651	(1,578)	1,069	768	568	(1,073)	827	125	910	447	(577)
Net income (loss)	$ 2,166	$ (1,556)	$ 970	$ 686	$ 490	$ (1,125)	$ 779	$ 70	$ 2,266	214	$ (672)
Adjustments | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues										267
Cost of revenues										162
Gross profit										105
Selling, general and administrative										49
Operating income (loss)										56
Net income (loss)										56
Balance Without Adoption
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues										44,579
Cost of revenues										31,204
Gross profit										13,375
Selling, general and administrative										12,052
Operating income (loss)										503
Net income (loss)										$ 270