DEBT AND OTHER FINANCING ARRANGEMENTS - Revolving Credit Facility and Term Loan (Details) - USD ($)				3 Months Ended	12 Months Ended
	Oct. 31, 2019	Sep. 30, 2019	Nov. 09, 2017	Mar. 31, 2019	Jun. 30, 2020	Oct. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Jun. 30, 2018
Debt Instrument [Line Items]
Proceeds from revolving credit facility					$ 0			$ 0	$ 12,500,000
Repayment of line of credit					$ 0			$ 0	$ 7,111,000
Credit Agreement | JPMorgan Chase Bank N.A
Debt Instrument [Line Items]
Proceeds from revolving credit facility			$ 25,000,000
Term loan credit agreement term			5 years
Cantaloupe
Debt Instrument [Line Items]
Proceeds from revolving credit facility			$ 27,800,000
2018 JPMorgan Term Loan
Debt Instrument [Line Items]
Repayments of debt		$ 1,500,000
2018 JPMorgan Term Loan | Credit Agreement | JPMorgan Chase Bank N.A
Debt Instrument [Line Items]
Maximum borrowing capacity			12,500,000
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 10,000,000					$ 10,000,000
Revolving Credit Facility | JPMorgan Chase Bank N.A
Debt Instrument [Line Items]
Repayment of line of credit	$ 10,100,000
Revolving Credit Facility | Credit Agreement | JPMorgan Chase Bank N.A
Debt Instrument [Line Items]
Proceeds from revolving credit facility			35,000,000.0
Revolving Credit Facility | Loan And Security Agreement | Heritage Bank Of Commerce
Debt Instrument [Line Items]
Repayment of line of credit			$ 7,200,000
Revolving Credit Facility and Term Loan
Debt Instrument [Line Items]
Extension fee							$ 200,000
Repayments of debt				$ 20,000,000.0
Revolving Credit Facility and Term Loan | Credit Agreement | LIBOR
Debt Instrument [Line Items]
Interest rate						4.00%