Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Cash flows from operating activities:
Net loss	$ (27,484)us-gaap_NetIncomeLoss	$ (3,030)us-gaap_NetIncomeLoss	$ (19,165)us-gaap_NetIncomeLoss
Net (income) loss from discontinued operations	(5)	803	16,366
Adjustments to reconcile net loss to net cash (used in) provided by continuing operating activities:
Depreciation and amortization of property and equipment	3,683us-gaap_Depreciation	4,389us-gaap_Depreciation	4,671us-gaap_Depreciation
Amortization of intangible assets	5,154us-gaap_AdjustmentForAmortization	4,630us-gaap_AdjustmentForAmortization	6,395us-gaap_AdjustmentForAmortization
Stock-based compensation expense	3,220us-gaap_ShareBasedCompensation	2,959us-gaap_ShareBasedCompensation	5,929us-gaap_ShareBasedCompensation
Deferred income taxes	(372)	(684)	(132)
Other	512us-gaap_OtherNoncashIncomeExpense	798us-gaap_OtherNoncashIncomeExpense	2,596us-gaap_OtherNoncashIncomeExpense
Changes in operating assets and liabilities:
Accounts receivable	3,567	5,420	1,676
Unbilled receivables	(1,993)	(5,251)	4,637
Inventories	3,183us-gaap_IncreaseDecreaseInInventories	(234)us-gaap_IncreaseDecreaseInInventories	2,563us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other assets	1,570	6,724	(5,045)
Accounts payable	(1,619)	(873)	(236)
Accrued expenses	1,650	(3,146)	1,430
Deferred revenues	(5,699)	(4,877)	(6,283)
Other	1,289	539	568
Net cash (used in) provided by operating activities from continuing operations	(13,344)	8,167	15,970
Net cash provided by (used in) operating activities from discontinued operations	5	(803)	1,387
Total cash (used in) provided by operating activities	(13,339)	7,364	17,357
Cash flows from investing activities:
Purchases of property and equipment	(1,873)	(2,315)	(3,972)
Purchases of marketable securities	(9,193)	(11,479)	(15,642)
Proceeds from sale and maturity of marketable securities	7,181	12,237	14,214
Investment in affiliate	(2,000)
Proceeds from sale of equity investment	229	1,128	885
Acquisition of businesses and payment of contingent consideration, net of cash acquired		(4,009)	(8,175)
Advance for Timeline Labs acquisition	(2,500)
Other		958	452
Net cash used in investing activities from continuing operations	(8,156)	(3,480)	(12,238)
Net cash provided by investing activities from discontinued operations		4,000	25,232
Total cash (used in) provided by investing activities	(8,156)	520	12,994
Cash flows from financing activities:
Repurchases of our common stock	(5,504)		(6,200)
Proceeds from issuance of common stock relating to stock option exercises		1,058	2,191
Total cash provided by (used in) financing activities	(5,504)	1,058	(4,009)
Effect of exchange rate changes on cash	1,284	71	(206)
Net (decrease) increase in cash and cash equivalents	(25,715)	9,013	26,136
Cash and cash equivalents, beginning of period	115,734	106,721	80,585
Cash and cash equivalents, end of period	90,019	115,734	106,721
Supplemental disclosure of cash flow information:
Income taxes paid	671us-gaap_IncomeTaxesPaid	2,606us-gaap_IncomeTaxesPaid	1,312us-gaap_IncomeTaxesPaid
Interest paid	6us-gaap_InterestPaid	4us-gaap_InterestPaid	89us-gaap_InterestPaid
Supplemental disclosure of non-cash activities:
Transfer of items originally classified as inventories to equipment	474	1,110	897
Issuance of common stock for settlement of contingent consideration related to acquisitions		1,560
Asset held for sale reclassified to asset held for use and reclassified from current assets to property and equipment		$ 465

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