Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2022
Segment Reporting Information [Line Items]
Gross revenues	$ 194,508	$ 164,396	$ 403,405	$ 335,122
Revenue	193,840	161,965	402,271	330,058
Gross profit (loss)	(1,302)	3,207	11,706	(301)
Selling, general and administrative expenses	17,545	15,922	34,356	32,551
Goodwill impairment and restructuring costs	13,594	695	14,881	1,300
Operating loss	(32,441)	(13,410)	(37,531)	(34,152)
Segment assets	438,118		438,118		$ 440,793
Utility and Power Infrastructure
Segment Reporting Information [Line Items]
Gross revenues	50,589	54,752	95,459	111,956
Revenue	50,535	54,752	95,405	111,956
Gross profit (loss)	2,426	(491)	4,139	(6,598)
Selling, general and administrative expenses	1,787	3,150	3,525	6,200
Goodwill impairment and restructuring costs	0	37	37	46
Operating loss	639	(3,678)	577	(12,844)
Segment assets	89,480		89,480		94,059
Process and Industrial Facilities
Segment Reporting Information [Line Items]
Gross revenues	80,789	52,037	167,526	97,247
Revenue	80,789	50,316	167,417	94,221
Gross profit (loss)	(5,131)	4,235	(801)	7,106
Selling, general and administrative expenses	3,682	2,792	7,752	5,554
Goodwill impairment and restructuring costs	12,698	(24)	13,012	(17)
Operating loss	(21,511)	1,467	(21,565)	1,569
Segment assets	119,401		119,401		104,078
Storage and Terminal Solutions
Segment Reporting Information [Line Items]
Gross revenues	63,130	57,607	140,420	125,919
Revenue	62,516	56,897	139,449	123,881
Gross profit (loss)	1,648	(172)	9,213	241
Selling, general and administrative expenses	5,450	4,280	9,608	8,786
Goodwill impairment and restructuring costs	383	107	906	74
Operating loss	(4,185)	(4,559)	(1,301)	(8,619)
Segment assets	144,561		144,561		141,084
Corporate
Segment Reporting Information [Line Items]
Gross profit (loss)	(245)	(365)	(845)	(1,050)
Selling, general and administrative expenses	6,626	5,700	13,471	12,011
Goodwill impairment and restructuring costs	513	575	926	1,197
Operating loss	(7,384)	(6,640)	(15,242)	(14,258)
Segment assets	84,676		84,676		$ 101,572
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Gross revenues	668	2,431	1,134	5,064
Intersegment Eliminations [Member] | Utility and Power Infrastructure
Segment Reporting Information [Line Items]
Gross revenues	54	0	54	0
Intersegment Eliminations [Member] | Process and Industrial Facilities
Segment Reporting Information [Line Items]
Gross revenues	0	1,721	109	3,026
Intersegment Eliminations [Member] | Storage and Terminal Solutions
Segment Reporting Information [Line Items]
Gross revenues	$ 614	$ 710	$ 971	$ 2,038