v3.5.0.2
Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Cash flows from operating activities    
Net loss $ (11,717) $ (15,098)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation and amortization 4,526 3,390
Stock-based compensation expense 7,520 5,915
Changes in operating assets and liabilities:    
Increase in accounts receivable, net (4,267) (4,043)
Decrease (increase) in advance to clients 75 (875)
Increase in prepaid expenses and other current assets (645) (366)
Increase in accounts payable 1,044 784
Decrease in accrued compensation and related benefits (3,419) (1,533)
Increase in accrued expenses and other liabilities 4,776 8,108
Increase in deferred revenue 14,978 11,520
Decrease (increase) in payments to clients 1,664 (336)
Increase in other assets and other liabilities, net (3,028) (1,424)
Net cash provided by operating activities 11,507 6,042
Cash flows from investing activities    
Purchases of property and equipment (1,029) (589)
Capitalized technology and content development cost expenditures (7,437) (5,949)
Other (142)  
Net cash used in investing activities (8,608) (6,538)
Cash flows from financing activities    
Proceeds from exercise of stock options 2,156 2,227
Other (533) (436)
Net cash provided by financing activities 1,623 1,791
Net increase in cash and cash equivalents 4,522 1,295
Cash and cash equivalents, beginning of period 183,729 86,929
Cash and cash equivalents, end of period 188,251 88,224
Supplemental disclosure of non-cash investing and financing activities    
Accrued capital expenditures $ 904 $ 199