v3.7.0.1
Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Operating activities    
Net income (loss) $ (6,082) $ 15
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 8,211 5,254
Amortization of debt discount, deferred financing fees and bond premium 450 333
Non-cash stock-based compensation expense 6,030 7,496
Non-cash long-lived asset impairment charge 190 0
Non-cash loss on disposal of long-lived assets 3 171
Deferred income taxes 10 0
Changes in certain assets:    
Accounts receivable, net 1,365 129
Prepaid expenses and other current assets (3,249) 728
Changes in certain liabilities:    
Accounts payable 318 (2,542)
Accrued liabilities 6,776 9,557
Net cash provided by operating activities 8,677 14,286
Investing activities    
Purchases of investments (5,960) (11,274)
Sales of investments 12,021 11,320
Property, equipment and software (199) (3,208)
Capitalized website and software development costs (2,854) (8,973)
Intangible assets (70) (129)
Net cash provided by (used in) investing activities 2,938 (12,264)
Financing activities    
Proceeds from exercise of stock options 5,919 500
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Excluding Stock Options 462 0
Taxes paid on behalf of employees related to net share settlement (1,980) (430)
Purchases of treasury stock (15) 0
Payments on capital lease obligation (41) (116)
Net cash provided by (used in) financing activities 4,345 (46)
Net increase in cash and cash equivalents 15,960 1,976
Cash and cash equivalents, beginning of period 22,402 32,599
Cash and cash equivalents, end of period 38,362 34,575
Supplemental cash flow disclosures    
Capital expenditures incurred but not yet paid 65 820
Deferred advertising revenue [Member]    
Changes in certain liabilities:    
Deferred revenue (1,764) (2,769)
Deferred membership revenue [Member]    
Changes in certain liabilities:    
Deferred revenue $ (3,581) $ (4,086)