Note 2 - Business Segment Information (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Intersegment Revenue Markup Percentage		10.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Concentration Risk, Percentage		0.00%	0.00%	0.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk, Percentage		0.00%	0.00%
Reclassification of Operating Loss from the Technology Segment to the Graphics Segment [Member] | Fiscal 2016 [Member]
Prior Period Reclassification Adjustment	$ 183,000
Reclassification of Operating Loss from the Technology Segment to the Graphics Segment [Member] | Fiscal 2015 [Member]
Prior Period Reclassification Adjustment	$ 204,000