Seperate into inflows and outflows for a summary analysis 

	2017	2016	2015
Cash and Cash Equivalents, Beginning of period	$ 19,334	$ 15,890	$ 14,557
Opertating activities
Net income (loss)	$ 3,033	$ 2,371	$ 596
Depreciation of property and equipment, including internal-use software and website development, and other amortization, including capitalized content costs	$ 11,478	$ 8,116	$ 6,281
Stock-based compensation	$ 4,215	$ 2,975	$ 2,119
Other operating expense, net	$ 202	$ 160	$ 155
Other (income) expense, net	$ (292)	$ (20)	$ 250
Deferred income taxes	$ (29)	$ (246)	$ 81
Excess tax benefits from stock-based compensation		$ (829)	$ (119)
Inventories	$ (3,583)	$ (1,426)	$ (2,187)
Accounts receivable, net and other	$ (4,786)	$ (3,367)	$ (1,755)
Accounts payable	$ 7,175	$ 5,030	$ 4,294
Accrued expenses and other	$ 283	$ 1,724	$ 913
Unearned revenue	$ 738	$ 1,955	$ 1,292
Changes in operating assets and liabilities	$ (173)	$ 3,916	$ 2,557
Adjustments to reconcile net income (loss) to net cash from operating activities	$ 15,401	$ 14,072	$ 11,324
Net cash provided by operating activities	$ 18,434	$ 16,443	$ 11,920
Purchases of property and equipment, including internal-use software and website development, net	$ (11,955)	$ (7,804)	$ (5,387)
Proceeds from property and equipment incentives	$ 1,897	$ 1,067	$ 798
Acquisitions, net of cash acquired, and other	$ (13,972)	$ (116)	$ (795)
Sales and maturities of marketable securities	$ 9,988	$ 4,733	$ 3,025
Purchases of marketable securities	$ (13,777)	$ (7,756)	$ (4,091)
Net cash used in investing activities	$ (27,819)	$ (9,876)	$ (6,450)
Excess tax benefits from stock-based compensation		$ 829	$ 119
Proceeds from long-term debt and other	$ 16,231	$ 621	$ 353
Repayments of long-term debt and other	$ (1,372)	$ (354)	$ (1,652)
Principal repayments of capital lease obligations	$ (4,799)	$ (3,860)	$ (2,462)
Principal repayments of finance lease obligations	$ (200)	$ (147)	$ (121)
Net cash provided by (used in) financing activities	$ 9,860	$ (2,911)	$ (3,763)
Foreign currency effect on cash and cash equivalents	$ 713	$ (212)	$ (374)
Net increase (decrease) in cash and cash equivalents	$ 1,188	$ 3,444	$ 1,333
Cash and cash equivalents, beginning of period	$ 19,334	$ 15,890	$ 14,557
Cash and cash equivalents, end of period	$ 20,522	$ 19,334	$ 15,890