Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Apr. 30, 2017	Apr. 30, 2016
Accrued Liabilities and Other Current Liabilities [Abstract]
Accrued compensation	$ 11,950	$ 9,819
Accrued taxes	582	1,886
Accrued revenue share	3,006	3,883
Customer credit balances	401	706
Accrued other liabilities	4,663	6,873
Total accrued expenses and other current liabilities	$ 20,602	$ 23,167