ACQUISITION OF CANTALOUPE SYSTEMS, INC. - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended						9 Months Ended		12 Months Ended
	Nov. 09, 2017	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
Business Acquisition [Line Items]
Face amount	$ 35,000
Goodwill		$ 64,149			$ 64,149			$ 64,149	$ 64,149	$ 64,149
Net earnings		(4,510)	$ (10,657)	$ (6,320)	(3,223)	$ (4,194)	$ (2,171)	(21,487)	(9,588)
Income tax benefit		$ 23			20			$ 60	(109)
Cantaloupe
Business Acquisition [Line Items]
Total consideration	88,207
Intangibles	$ 30,800
Weighted average useful life	13 years
Goodwill	$ 52,658
License and transaction fees					7,300				12,000
Net earnings					$ (500)				$ 1,000
Term Loan
Business Acquisition [Line Items]
Face amount	25,000
Revolving Credit Facility
Business Acquisition [Line Items]
Face amount	10,000
Customer Relationships | Cantaloupe
Business Acquisition [Line Items]
Intangibles	18,900
Developed Technology | Cantaloupe
Business Acquisition [Line Items]
Intangibles	10,300
Trade Names | Cantaloupe
Business Acquisition [Line Items]
Intangibles	$ 1,600
Minimum | Cantaloupe
Business Acquisition [Line Items]
Useful life	6 years
Minimum | Customer Relationships
Business Acquisition [Line Items]
Useful life								10 years		10 years
Minimum | Developed Technology
Business Acquisition [Line Items]
Useful life								5 years		5 years
Maximum | Cantaloupe
Business Acquisition [Line Items]
Useful life	18 years
Maximum | Customer Relationships
Business Acquisition [Line Items]
Useful life								18 years		18 years
Maximum | Developed Technology
Business Acquisition [Line Items]
Useful life								6 years		6 years