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Segment Reporting Segment reporting (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Net sales	$ 66,680	$ 68,539	$ 60,506	$ 57,240	$ 60,716	$ 64,762	$ 55,484	$ 47,659	$ 252,965	$ 228,621	$ 190,935
Depreciation and amortization									5,524	4,890	6,777
Net income (loss) before provision (benefit) for income taxes									32,096	31,846	(3,408)
Capital expenditures									6,176	5,366	5,915
Long-lived assets	41,986				41,606				41,986	41,606	29,039
Total assets	220,530				200,314				220,530	200,314	84,801
US segment [Member]
Segment Reporting Information [Line Items]
Net sales									232,116	213,702	190,935
Depreciation and amortization									4,900	4,318	6,777
Net income (loss) before provision (benefit) for income taxes									31,674	32,142	(3,408)
Capital expenditures									6,156	5,299	5,915
Long-lived assets	31,446				30,125				31,446	30,125	29,039
Total assets	220,817				200,260				220,817	200,260	84,801
Australia Segment [Member]
Segment Reporting Information [Line Items]
Net sales									20,849	14,919	0
Depreciation and amortization									624	572	0
Net income (loss) before provision (benefit) for income taxes									453	295	0
Capital expenditures									20	67	0
Long-lived assets	10,540				11,481				10,540	11,481	0
Total assets	17,130				17,982				17,130	17,982	0
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales									252,965	228,621	190,935
Operating Segments [Member] | US segment [Member]
Segment Reporting Information [Line Items]
Net sales									239,689	219,142	190,935
Operating Segments [Member] | Australia Segment [Member]
Segment Reporting Information [Line Items]
Net sales									20,849	14,919	0
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales									(7,573)	(5,440)	0
Net income (loss) before provision (benefit) for income taxes									(31)	(591)	0
Total assets	$ (17,417)				$ (17,928)				(17,417)	(17,928)	0
Intersegment Eliminations [Member] | US segment [Member]
Segment Reporting Information [Line Items]
Net sales									7,573	5,440	0
Intersegment Eliminations [Member] | Australia Segment [Member]
Segment Reporting Information [Line Items]
Net sales									$ 0	$ 0	$ 0

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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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