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Organization and Summary of Significant Accounting Policies (Tables)

3 Months Ended

Apr. 30, 2018

Accounting Policies [Abstract]

Schedule of Cash, Cash Equivalents and Restricted Cash

The following table presents cash, cash equivalents and restricted cash reported on the condensed consolidated balance sheets and the sums are presented on the condensed consolidated statements of cash flows:

		As of
		April 30, 2018				January 31, 2018				April 30, 2017				January 31, 2017
		(in thousands)								(in thousands)
Cash and cash equivalents		$	336,692			$	346,672			$	335,182			$	322,872
Restricted cash			9				9				9				8
Total as presented in the consolidated statements of cash flows		$	336,701			$	346,681			$	335,191			$	322,880

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