Revenue from Contracts with Customers - Disaggregation of revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 54,054	$ 56,864	$ 103,464	$ 108,978
North America
Disaggregation of Revenue [Line Items]
Net sales	27,106	33,098	53,090	64,106
International
Disaggregation of Revenue [Line Items]
Net sales	26,948	23,766	50,374	44,872
United States | North America
Disaggregation of Revenue [Line Items]
Net sales	25,345	31,085	49,682	59,708
Canada & Mexico | North America
Disaggregation of Revenue [Line Items]
Net sales	1,761	2,013	3,408	4,398
Brazil | International
Disaggregation of Revenue [Line Items]
Net sales	17,493	15,000	32,401	27,822
United Kingdom | International
Disaggregation of Revenue [Line Items]
Net sales	5,554	5,372	10,548	10,603
China | International
Disaggregation of Revenue [Line Items]
Net sales	2,005	1,653	3,586	3,167
Australia & New Zealand | International
Disaggregation of Revenue [Line Items]
Net sales	$ 1,896	$ 1,741	$ 3,839	$ 3,280