CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Net income (loss)	$ (569)	$ (309)	$ (2,424)	$ 6,209
Other comprehensive income, net of tax:
Change in pension liability, net of tax ($320 in 2015)	0	543	0	543
Other comprehensive income	0	543	0	543
Total comprehensive income (loss)	$ (569)	$ 234	$ (2,424)	$ 6,752