RESTATEMENT OF CONSOLIDATED FINANCIAL STATEMENTS - Condensed Consolidated Balance Sheet Impact of Adjustments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jul. 01, 2018	Jun. 30, 2018	Sep. 30, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable	$ 18,921		$ 15,748	$ 9,815
Finance receivables, net	5,141		4,603	1,441
Inventory, net	6,915		8,038	8,876
Prepaid expenses and other current assets	1,463	$ 1,180	929	1,056
Other assets	1,900	1,974	720	289
Property and equipment, net	9,778		11,273	10,701
Accounts payable	19,335		30,468	14,506
Accrued expenses	21,848		19,291	12,217
Capital lease obligations and current obligations under long-term debt	33,889		34,639	2,628
Deferred revenue	1,428	$ 1,638	511	439
Deferred gain from sale-leaseback transactions				0
Deferred gain from sale-leaseback transactions, less current portion				0
Common stock	$ 375,806		$ 375,436
Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable				(473)
Finance receivables, net				(1,641)
Inventory, net				636
Prepaid expenses and other current assets				(66)
Other assets				(461)
Property and equipment, net				(1,149)
Accounts payable				295
Accrued expenses				8,422
Capital lease obligations and current obligations under long-term debt				(21)
Deferred revenue				439
Deferred gain from sale-leaseback transactions				(197)
Deferred gain from sale-leaseback transactions, less current portion				(99)
Adjustments | Audit Committee Investigation-related Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable				(315)
Finance receivables, net				(1,640)
Inventory, net				941
Prepaid expenses and other current assets				25
Other assets				82
Accounts payable				270
Accrued expenses				803
Adjustments | Significant Account and Transaction Review and Other
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accounts receivable				77
Inventory, net				(305)
Prepaid expenses and other current assets				(136)
Other assets				(543)
Property and equipment, net				(1,149)
Accounts payable				25
Accrued expenses				8,319
Capital lease obligations and current obligations under long-term debt				(21)
Deferred revenue				(27)
Deferred gain from sale-leaseback transactions				(198)
Deferred gain from sale-leaseback transactions, less current portion				(99)
Common stock				$ (166)