Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Apr. 30, 2016	Apr. 30, 2015
Accrued Liabilities and Other Current Liabilities [Abstract]
Accrued compensation	$ 9,819	$ 10,675
Accrued taxes	1,886	3,629
Accrued revenue share	3,883	4,940
Customer credit balances	706	628
Accrued other liabilities	6,873	7,525
Total accrued expenses and other current liabilities	$ 23,167	$ 27,397