Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Revenue
Products sales and leasing	$ 7,453,000	$ 4,947,000
Barrier rentals	309,000	2,523,000
Shipping and installation revenue	1,142,000	1,596,000
Royalties	221,000	431,000
Total revenue	9,125,000	9,497,000
Cost of goods sold	7,534,000	6,181,000
Gross profit	1,591,000	3,316,000
Operating expenses
General and administrative expenses	1,468,000	1,350,000
Selling expenses	676,000	610,000
Total operating expenses	2,144,000	1,960,000
Operating income (loss)	(553,000)	1,356,000
Interest income (expense)
Interest expense	(46,000)	(46,000)
Interest income	10,000	9,000
Gain on sale of assets	24,000	13,000
Other income	8,000	11,000
Total other expense	(4,000)	(13,000)
Income (loss) before income tax expense	(557,000)	1,343,000
Income tax expense (benefit)	(135,000)	486,000
Net income (loss)	$ (422,000)	$ 857,000
Basic and diluted earnings per share (in dollars per share)	$ (0.08)	$ 0.17
Weighted average number of common shares outstanding:
Basic (in shares)	5,114,000	5,009,000
Diluted (in shares)	5,114,000	5,052,000