Note 5 - Commitments and Contingencies (Tables)

3 Months Ended

Sep. 30, 2017

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

Balance at July 1, 2017	$	588,000
Warranties issued during the period		40,000
Settlements made during the period		(297,000	)
Changes in liability for pre-existing warranties during the period		(4,000	)
Balance at September 30, 2017	$	327,000