Note 12 - Warranty Obligations (Tables)

3 Months Ended

Jun. 30, 2018

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

(In thousands)	Three Months Ended June 30 , 201 8			Three Months Ended June 2 4 , 201 7
Balance at beginning of period	$	164		$	123
Provision, net		6			1
Warranty costs incurred		(29	)		(33	)
Balance at end of period	$	141		$	91