v2.4.0.8
Condensed Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Jan. 31, 2014
Jan. 31, 2013
Operating activities:    
Net loss $ (39,485) $ (40,608)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:    
Depreciation and amortization expense 11,167 7,473
Stock-based expense 10,996 19,072
Revaluation of contingent consideration (3,270)  
Bad debt expense 1,433 1,643
Excess tax benefit related to stock-based expense (96) (365)
Changes in operating assets and liabilities:    
Accounts receivable (15,802) (10,581)
Prepaid expenses and other current assets (375) 257
Other non-current assets (1,473) 1,161
Accounts payable 475 521
Accrued expenses and other current liabilities (2,214) 7,027
Deferred revenue (1,185) 4,647
Other liabilities, long-term (927) (2,952)
Net cash used in operating activities (40,756) (12,705)
Investing activities:    
Acquisitions, net of cash acquired, and purchase of intangible asset (670) (60,750)
Purchases of property, equipment and capitalized internal-use software development costs (8,506) (8,004)
Purchases of short-term investments (34,517) (74,578)
Proceeds from maturities of short-term investments 45,410 38,769
Proceeds from sales of short-term investments 31,292 5,014
Net cash provided by (used in) investing activities 33,009 (99,549)
Financing activities:    
Proceeds from follow-on stock offering, net of costs   51,943
Proceeds from employee stock compensation plans 11,039 9,470
Excess tax benefit related to stock-based expense 96 365
Net cash provided by financing activities 11,135 61,778
Effect of exchange rate fluctuations on cash and cash equivalents 259 (46)
Net change in cash and cash equivalents 3,647 (50,522)
Cash and cash equivalents at beginning of period 25,045 74,367
Cash and cash equivalents at end of period 28,692 23,845
Supplemental disclosure of other cash flow information:    
Cash paid for income taxes 730 236
Supplemental disclosure of non-cash investing and financing activities:    
Issuance of stock for acquisition   $ 125,497