Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 25, 2015	Jan. 26, 2014
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal income tax at statutory rate	$ 7,133	$ 12,775	$ (44,968)
State income taxes, net of federal benefit	(7)	(100)	(1,260)
Foreign taxes at rates less than federal rates	(62)	(11,960)	(8,378)
Tax credits generated	(3,598)	(5,302)	(5,523)
Changes in valuation allowance	1,847	14,284	52,942
Goodwill impairment	0	0	40,840
Changes in uncertain tax positions	1,009	(5,167)	893
Deemed dividends	276	2,513	726
Equity compensation	2,529	2,200	1,173
Permanent differences	28	(93)	2,895
Deferred tax provision - indefinite life intangible	5,670	0	0
Triune earn-out	(5,670)	0	0
Revaluation of deferred tax assets and liabilities	334	(432)	(12)
Other	(607)	(170)	(3,343)
Provision for taxes	$ 8,882	$ 8,548	$ 35,985