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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Cash flows from operating activities:    
Net income $ 6,194 $ 3,385
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 4,612 4,472
Loss on disposal of fixed assets 191 41
Impairment of software development costs 0 1,759
Provision for receivable allowance 217 129
Share-based compensation expense 2,729 2,926
Income tax benefits from employee stock plans 2,017 342
Excess tax benefits from employee stock plans (2,287) (555)
Provision for excess and obsolete inventories 32 451
Deferred income taxes (299) (1,076)
Changes in operating assets and liabilities:    
Accounts receivable, net (17,114) (10,706)
Inventories 450 327
Prepaid expenses 2,505 (657)
Other current assets (27) 1,061
Non-current net investment in sales-type leases (239) 443
Other assets 176 (463)
Accounts payable 3,683 124
Accrued compensation (7,586) (4,665)
Accrued liabilities (252) 537
Deferred service revenue 712 (42)
Deferred gross profit 5,149 6,166
Other long-term liabilities 254 133
Net cash provided by operating activities 1,117 4,132
Cash flows from investing activities:    
Acquisition of intangible assets and intellectual property (139) (48)
Software development for external use (2,902) (1,899)
Purchases of property and equipment (2,551) (3,300)
Net cash used in investing activities (5,592) (5,247)
Cash flows from financing activities:    
Proceeds from issuance of common stock under employee stock purchase and stock option plans 9,624 8,315
Employees' taxes paid related to restricted stock units (349) (211)
Common stock repurchases (4,069) 0
Excess tax benefits from employee stock plans 2,287 555
Net cash provided from financing activities 7,493 8,659
Effect of exchange rate changes on cash and cash equivalents 9 (40)
Net increase in cash and cash equivalents 3,027 7,504
Cash and cash equivalents at beginning of period 104,531 62,313
Cash and cash equivalents at end of period $ 107,558 $ 69,817