Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Sep. 30, 2017	Jun. 30, 2017
Accounts Receivable, Allowance for Doubtful Accounts	$ 139,000	$ 102,000
Inventories, Reserves	$ 1,257,000	$ 1,230,000
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	2,000,000	2,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	350,000,000	350,000,000
Common stock, shares issued (in shares)	9,959,943	9,915,868
Common stock, shares outstanding (in shares)	9,959,943	9,915,868