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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2014 | Jun. 30, 2013
Cash Flows from Operating Activities |  |
Net income (loss) | $ 3,949 | $ (14,152)
Adjustments to reconcile net income (loss) to net cash from operating activities: |  |
Depreciation and amortization | 11,600 | 7,985
Deferred income taxes | (2,675) | (10,571)
Non-cash equity-based compensation | 9,813 | 6,292
Provision (recovery) for bad debt | (1,936) | 11
Gross profit from sales of lab tools | (2,435) |
Change in contingent consideration | (29,368) |
Excess tax benefits from equity-based compensation |  | (461)
Other, net |  | 15
Changes in operating assets and liabilities: |  |
Accounts receivable | (32,721) | 18,099
Inventories | 12,052 | (4,211)
Prepaid expenses and other current assets | (6,621) | (8,901)
Accounts payable | (8,026) | 20,912
Accrued expenses, customer deposits, deferred revenue and other current liabilities | 29,638 | (7,095)
Income taxes payable | 646 | (1,708)
Other, net | (692) | 7,536
Net cash provided by (used in) operating activities | (16,776) | 13,751
Cash Flows from Investing Activities |  |
Capital expenditures | (4,509) | (5,999)
Proceeds from the liquidation of short-term investments | 121,233 | 272,449
Payments for purchases of short-term investments | (92,029) | (420,767)
Proceeds from sale of lab tools | 7,034 |
Other | (685) | (718)
Net cash provided by (used in) investing activities | 31,044 | (155,035)
Cash Flows from Financing Activities |  |
Proceeds from stock option exercises | 9,125 | 313
Restricted stock tax withholdings | (1,867) | (2,335)
Excess tax benefits from equity-based compensation |  | 461
Repayments of long-term debt | (141) | (132)
Net cash provided by (used in) financing activities | 7,117 | (1,693)
Effect of exchange rate changes on cash and cash equivalents | 148 | (32)
Net increase (decrease) in cash and cash equivalents | 21,533 | (143,009)
Cash and cash equivalents as of beginning of period | 210,799 | 384,557
Cash and cash equivalents as of end of period | $ 232,332 | $ 241,548

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X
- 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 Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The noncash component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing operations. + References No definition available. + Details
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X
- Definition The net change during the reporting period in the aggregate amount of expenses incurred but not yet paid, deferred revenue, customer deposits and other current liabilities. + References No definition available. + Details
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