CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2017	Apr. 30, 2016
Net loss	$ (15)	$ (10,224)
Other comprehensive income (loss), net of tax:
Change in pension liability, net of tax ($1,141 in 2017 and $165 in 2016)	1,861	(268)
Other comprehensive income (loss)	1,861	(268)
Total comprehensive income (loss)	$ 1,846	$ (10,492)