SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition and Shipping and Handling Costs (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Revenue Recognition
Dealer rebates and sales promotion incentives	$ 6,361	$ 5,660	$ 6,701
Retail rebates	1,932	5,484	3,628
Floor plan reimbursement costs	5,143	3,705	3,472
Shipping and Handling Costs
Shipping and handling costs billed to customers	4,774	4,124	4,043
Shipping and handling costs included in cost of sales	5,526	3,584	$ 3,952
Cash and cash equivalents
Cash equivalents	$ 0	$ 0
Maximum
Revenue Recognition
Term of reimbursement program	9 months

Rebates which apply to merchandise already in dealer inventory.

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The aggregate selling price reductions recognized during an accounting period for floor plan interest costs incurred by dealers for limited periods of time. Allowances are a deduction from gross revenue in arriving at net revenue.

+ References

No definition available.

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Period of time during which entity may reimburse dealers for certain floor plan interest costs per reimbursement program.

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- References

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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
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- Definition

Amount of reduction to gross sales revenue attributable to price protection agreements with customers or clients which limit the sales price of goods or services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 605
-Section 25
-Paragraph 36
-Subparagraph d
-URI http://asc.fasb.org/extlink&oid=68047459&loc=d3e131949-111767

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- Definition

Fees charged to customers for the delivery, generally by postal or freight service providers, of product or goods purchased.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 45
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=68075638&loc=d3e60635-111653

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- Definition

Cost incurred during the reporting period in transporting goods and services to customers. Includes freight-out costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
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