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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012
Cash flows from operating activities: |  |
Net income | $ 3,438 | $ 2,132
Adjustments to reconcile net income to net cash provided by operations: |  |
Depreciation and amortization expense | 979 | 1,012
Amortization of deferred rent | (77) | (21)
Share-based compensation expense | 205 | 176
Provision for (recoveries of) doubtful accounts, net | 61 | 6
Inventory valuation reserve adjustments | 524 | 278
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Operating Activities | (76) | 0
Changes in operating assets and liabilities: |  |
Receivables | (115) | 784
Inventories | (1,258) | 88
Deferred income taxes | 0 | (11)
Prepaid expenses and other assets | (262) | 336
Accounts payable | 1,180 | (1,403)
Accrued liabilities | 143 | 123
Income taxes payable | (14,782) | (1,155)
Deferred product revenue | 512 | 141
Other long-term liabilities | 0 | 138
Net cash (used in) provided by operating activities | (9,528) | 2,624
Cash flows from investing activities: |  |
Purchase of property and equipment | (723) | (260)
Purchase of marketable securities | (25,409) | 0
Payment towards business acquisitions | 0 | (4,632)
Net cash (used in) investing activities | (26,132) | (4,892)
Cash flows from financing activities: |  |
Proceeds from the exercise of stock options | 456 | 301
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities | 76 | 0
Treasury stock purchased | (2,191) | (384)
Net cash (used in) financing activities | (1,659) | (83)
Net (decrease) in cash and cash equivalents | (37,319) | (2,351)
Cash and cash equivalents at the beginning of the period | 55,509 | 16,683
Cash and cash equivalents at the end of the period | 18,190 | 14,332
Supplemental disclosure of cash flow information: |  |
Cash paid for income taxes | $ 16,987 | $ 1,393

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