Warranty Reserves

12 Months Ended

Apr. 30, 2018

Warranty Reserves

Warranty Reserves

9.           Warranty Reserves

Warranty reserve activity is summarized as follows:

	April 30,
	2018		2017
	(In thousands)
Beginning balance	$	1,947	$	3,094
Warranty expense		1,884		187
Changes in estimates related to pre-existing warranties		—		1,651
Warranty costs settled		(1,741)		(2,985)
Ending balance	$	2,090	$	1,947

During the fiscal year ended April 30, 2017, the Company revised its estimates based on the results of additional engineering studies and recorded incremental warranty reserve charges totaling $1,651,000 related to the estimated costs to repair a component of certain small UAS that were delivered in prior periods. At April 30, 2018 and 2017, there were zero and $441,000remaining estimated warranty costs related to the repair of the impacted small UAS, respectively. As of April 30, 2018 and 2017, a total of $2,198,000 and $1,762,000 of costs related to this warranty have been incurred, respectively.