Segment Information (Details Textual)	12 Months Ended
	Jun. 30, 2018 Rate	Jun. 30, 2017 Rate	Jun. 30, 2016 Rate
Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	11.40%	19.50%	14.80%
Customer Two [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	8.60%	15.30%	10.60%
Customer Three [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	6.40%	5.20%	8.30%
Customer Four [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	6.00%	4.20%	4.40%
Customer Five [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	4.20%	4.00%	4.20%
Customer Six [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	3.20%	2.70%	3.90%
Customer Seven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	3.20%	2.20%	3.80%
Customer Eight [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	3.00%		3.40%
Customer Nine [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	2.70%		2.30%
Customer Ten [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	2.30%		2.10%
Customer Eleven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue			1.60%
Electrical Infrastructure [Member] | Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	38.90%
Electrical Infrastructure [Member] | Customer Two [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	46.00%	0.00%
Electrical Infrastructure [Member] | Customer Three [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	26.50%	0.00%	0.00%
Electrical Infrastructure [Member] | Customer Four [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	25.40%	0.00%	16.60%
Electrical Infrastructure [Member] | Customer Five [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	12.70%	0.00%
Electrical Infrastructure [Member] | Customer Six [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Electrical Infrastructure [Member] | Customer Seven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	14.40%
Electrical Infrastructure [Member] | Customer Eight [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	12.90%		12.70%
Electrical Infrastructure [Member] | Customer Nine [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%		0.00%
Electrical Infrastructure [Member] | Customer Ten [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	10.00%		0.00%
Electrical Infrastructure [Member] | Customer Eleven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue			0.00%
Oil Gas & Chemical [Member] | Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Oil Gas & Chemical [Member] | Customer Two [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	29.00%	0.00%	0.00%
Oil Gas & Chemical [Member] | Customer Three [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	25.80%	0.00%
Oil Gas & Chemical [Member] | Customer Four [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	20.70%	0.00%
Oil Gas & Chemical [Member] | Customer Five [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	12.00%	0.00%	0.00%
Oil Gas & Chemical [Member] | Customer Six [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	10.80%	0.00%	20.20%
Oil Gas & Chemical [Member] | Customer Seven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Oil Gas & Chemical [Member] | Customer Eight [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%		0.00%
Oil Gas & Chemical [Member] | Customer Nine [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%		0.00%
Oil Gas & Chemical [Member] | Customer Ten [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%		11.20%
Oil Gas & Chemical [Member] | Customer Eleven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue			0.00%
Storage Solutions [Member] | Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	48.50%	10.20%
Storage Solutions [Member] | Customer Two [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	2.40%	24.70%
Storage Solutions [Member] | Customer Three [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.60%	0.00%	19.30%
Storage Solutions [Member] | Customer Four [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Storage Solutions [Member] | Customer Five [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	2.20%	0.00%	0.00%
Storage Solutions [Member] | Customer Six [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Storage Solutions [Member] | Customer Seven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	10.90%	0.00%	0.00%
Storage Solutions [Member] | Customer Eight [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%		0.00%
Storage Solutions [Member] | Customer Nine [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%		0.00%
Storage Solutions [Member] | Customer Ten [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%		0.00%
Storage Solutions [Member] | Customer Eleven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue			0.00%
Industrial [Member] | Customer One [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	62.90%	0.00%	0.00%
Industrial [Member] | Customer Two [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Industrial [Member] | Customer Three [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Industrial [Member] | Customer Four [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	0.00%
Industrial [Member] | Customer Five [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	0.00%	36.90%
Industrial [Member] | Customer Six [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	31.70%	0.00%
Industrial [Member] | Customer Seven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%	25.80%	0.00%
Industrial [Member] | Customer Eight [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%		0.00%
Industrial [Member] | Customer Nine [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	14.70%		20.10%
Industrial [Member] | Customer Ten [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue	0.00%		0.00%
Industrial [Member] | Customer Eleven [Member]
Revenue, Major Customer [Line Items]
Percentage of Revenue			14.00%