SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Apr. 30, 2019

SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS

Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]

SUPPLEMENTARY DATA

SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS

			Additions
	Balance at		Charged to		Charged to				Balance at
	Beginning		Costs and		Other				End of
Description	of Period		Expenses		Accounts		Deductions		Period
	(In thousands)
Allowance for doubtful accounts for the year ended April 30:
2017	$	56	$	56	$	—	$	(8)	$	104
2018	$	104	$	976	$	—	$	—	$	1,080
2019	$	1,080	$	198	$	—	$	(237)	$	1,041
Warranty reserve for the year ended April 30:
2017	$	3,094	$	1,838	$	—	$	(2,985)	$	1,947
2018	$	1,947	$	1,884	$	—	$	(1,741)	$	2,090
2019	$	2,090	$	702	$	—	$	(1,088)	$	1,704
Reserve for inventory excess and obsolescence for the year ended April 30:
2017	$	2,542	$	1,115	$	—	$	(901)	$	2,756
2018	$	2,756	$	2,758	$	—	$	(1,561)	$	3,953
2019	$	3,953	$	5,054	$	—	$	(1,183)	$	7,824
Reserve for self-insured medical claims for the year ended April 30:
2017	$	979	$	7,037	$	—	$	(6,883)	$	1,133
2018	$	1,133	$	9,100	$	—	$	(9,230)	$	1,003
2019	$	1,003	$	10,808	$	—	$	(10,867)	$	944