Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Cash Flows

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Condensed Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Oct. 31, 2013
Oct. 31, 2012
Operating activities    
Net loss $ (38,074) $ (23,591)
Adjustments to reconcile net loss to net cash used in operating activities    
Depreciation and amortization 8,171 5,147
Loss on disposition of assets   23
Stock-based compensation 30,570 18,610
Amortization of premium on investments 57 279
Amortization of debt issuance costs 187 198
Changes in assets and liabilities    
Accounts receivable (38,386) (31,126)
Prepaid expenses and other assets (4,715) (2,036)
Accounts payable and accrued liabilities 13,909 4,532
Accrued royalties 5,416 10,608
Accrued compensation (3,319) (243)
Deferred revenue 13,822 7,744
Reimbursement of cost of leasehold improvements 1,555 1,243
Net cash used in operating activities (10,807) (8,612)
Investing activities    
Purchases of property and equipment (14,891) (5,981)
Purchases of patents (8,000)  
Purchases of short-term investments (20,426) (50,124)
Proceeds from maturities of short-term investments 38,160 73,460
Payments related to acquisition (400)  
Net cash provided by (used in) investing activities (5,557) 17,355
Financing activities    
Borrowings under debt arrangements 10,000  
Repayments of debt (10,000)  
Proceeds from follow-on offering, net of issuance costs 379,088  
Proceeds from issuance of common stock 14,884 5,065
Tax withholdings related to net share settlements of restricted stock units (480) (208)
Payment of debt issuance costs in connection with the debt refinancing (450)  
Net cash provided by financing activities 393,042 4,857
Effect of exchange rate changes on cash and cash equivalents (23) (1)
Net increase in cash and cash equivalents 376,655 13,599
Cash and cash equivalents at beginning of period 65,725 44,126
Cash and cash equivalents at end of period $ 442,380 $ 57,725