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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net income | $ 4,864 | $ 7,228
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Provision for doubtful accounts | (25) | 5
Depreciation and amortization | 1,088 | 1,084
Share-based compensation expense | 1,148 | 636
Loss on sale of property and equipment | 11 | 13
Deferred income taxes | 235 | 449
Amortization of bond discount | 1 | 3
Purchase of trading investment securities | (19) | (19)
Proceeds from sale of trading investment securities | 105 | 92
Realized and unrealized gains on investments | (21) | (42)
Foreign exchange losses | (416) | 553
Changes in assets and liabilities: |  |
Accounts receivable | (555) | (3,279)
Inventories | 1,716 | 281
Prepaid expenses and other current assets | (658) | (884)
Other assets | 83 | 578
Accounts payable | (943) | (1,250)
Accrued volume incentives | 2,206 | 2,038
Accrued liabilities | 262 | (3,597)
Deferred revenue | (740) | 933
Income taxes payable | (516) | (2,988)
Liability related to unrecognized tax benefits | 38 | (1,261)
Deferred compensation payable | (41) | 15
Net cash provided by operating activities | 7,823 | 588
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Purchases of property, plant and equipment | (1,165) | (917)
Proceeds from sale of property, plant and equipment | 8 | 15
Proceeds from sale of investments available for sale | 0 | 3,499
Purchase of investments available for sale | (83) | (217)
Net cash provided by (used in) investing activities | (1,240) | 2,380
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Payments of cash dividends | (1,583) |
Principal payments of long-term debt | (834) | (816)
Proceeds from the exercise of stock options | 633 | 337
Net cash used in financing activities | (1,784) | (479)
Effect of exchange rates on cash and cash equivalents | (1,004) | (116)
Net increase in cash and cash equivalents | 3,795 | 2,373
Cash and cash equivalents at the beginning of the period | 79,241 | 58,969
Cash and cash equivalents at the end of the period | 83,036 | 61,342
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION: |  |
Cash paid for income taxes | 3,282 | 6,327
Cash paid for interest | $ 20 | $ 33

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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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Balance Type: | debit
Period Type: | duration

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- Details
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