Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Apr. 30, 2018

Equity [Abstract]

Schedule of Before Tax Income (Loss) Related Income Tax Effect and Accumulated Balances

The before tax income (loss), related income tax effect, and accumulated balances are as follows:

$ in thousands	Cash Flow Hedges			Foreign Currency Translation Adjustment			Minimum Pension Liability Adjustment			Total Accumulated Other Comprehensive Income (Loss)
Balance at April 30, 2015		(127	)		(1,011	)		(6,742	)		(7,880	)
Effect of changes in tax rates		1			—			88			89
Foreign currency translation adjustment		—			(217	)		—			(217	)
Change in fair value of cash flow hedges		37			—			—			37
Change in unrecognized actuarial loss on pension obligations		—			—			716			716
Income tax effect		(15	)		—			(356	)		(371	)
Balance at April 30, 2016		(104	)		(1,228	)		(6,294	)		(7,626	)
Effect of changes in tax rates		1			—			30			31
Foreign currency translation adjustment		—			231			—			231
Change in fair value of cash flow hedges		104			—			—			104
Change in unrecognized actuarial loss on pension obligations		—			—			1,609			1,609
Income tax effect		(41	)		—			(627	)		(668	)
Balance at April 30, 2017		(40	)		(997	)		(5,282	)		(6,319	)
Effect of changes in tax rates		3			—			996			999
Foreign currency translation adjustment		—			(430	)		—			(430	)
Change in fair value of cash flow hedges		57			—			—			57
Change in unrecognized actuarial loss on pension obligations		—			—			(586	)		(586	)
Income tax effect		(23	)		—			402			379
Balance at April 30, 2018	$	(3	)	$	(1,427	)	$	(4,470	)	$	(5,900	)