Segment Information - Summary of financial results for reportable segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales	$ 54,054	$ 56,864	$ 103,464	$ 108,978
Operating Income (Loss)	6,201	2,762	8,036	4,207
Unallocated
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales	0	0	0	0
Operating Income (Loss)	(1,923)	(1,510)	(3,757)	(3,433)
North American Operations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales	27,106	33,098	53,090	64,106
North American Operations | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales	27,106	33,098	53,089	64,106
Operating Income (Loss)	3,688	2,547	4,516	4,751
North American Operations | Intercompany sales
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Intercompany sales	992	1,049	1,737	2,016
International Operations | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales	26,948	23,766	50,375	44,872
Operating Income (Loss)	4,436	1,725	7,277	2,889
International Operations | Intercompany sales
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Intercompany sales	$ 2,610	$ 3,855	$ 5,396	$ 8,097