Segment Information - Summary of financial results for reportable segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales	$ 54,944	$ 49,998	$ 158,408	$ 158,976
Operating Income (Loss)	3,850	64	11,886	4,271
Unallocated
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales	0	0	0	0
Operating Income (Loss)	(1,773)	(1,721)	(5,529)	(5,015)
North American Operations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales	32,519	33,369	85,609	97,475
North American Operations | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales	32,519	33,369	85,609	97,475
Operating Income (Loss)	2,931	1,337	8,611	6,217
North American Operations | Intercompany sales
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Intercompany sales	1,338	1,063	3,075	3,079
International Operations | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Sales	22,425	16,629	72,799	61,501
Operating Income (Loss)	2,692	448	8,804	3,069
International Operations | Intercompany sales
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Intercompany sales	$ 3,197	$ 2,722	$ 8,593	$ 10,820