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Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013
Cash Flows from Operating Activities |  |
Net income (loss) | $ (10,028) | $ (20,178)
Adjustments to reconcile net income (loss) to net cash from operating activities: |  |
Depreciation and amortization | 17,649 | 12,080
Deferred income taxes | (4,973) | (5,196)
Non-cash asset impairment | 2,864 |
Non-cash equity-based compensation | 14,303 | 9,054
Provision (recovery) for bad debt | (1,833) | 5
Gross profit from sales of lab tools | (2,435) |
Change in contingent consideration | (29,368) |
Excess tax benefits from equity-based compensation |  | (485)
Other, net |  | 15
Changes in operating assets and liabilities: |  |
Accounts receivable | (36,149) | 25,095
Inventories | 13,650 | 2,165
Prepaid expenses and other current assets | (3,046) | (4,801)
Accounts payable | (9,679) | 2,307
Accrued expenses, customer deposits, deferred revenue and other current liabilities | 41,630 | (15,235)
Income taxes payable | 691 | (821)
Other, net | 124 | 605
Net cash provided by (used in) operating activities | (6,600) | 4,610
Cash Flows from Investing Activities |  |
Capital expenditures | (10,476) | (7,976)
Proceeds from the liquidation of short-term investments | 216,050 | 422,903
Payments for purchases of short-term investments | (157,733) | (553,217)
Payments for purchase of cost method investment | (2,388) | (1,594)
Proceeds from sale of lab tools | 7,034 |
Other | 126 | 25
Net cash provided by (used in) investing activities | 52,613 | (139,859)
Cash Flows from Financing Activities |  |
Proceeds from stock option exercises | 9,485 | 313
Restricted stock tax withholdings | (1,925) | (2,358)
Excess tax benefits from equity-based compensation |  | 485
Repayments of long-term debt | (215) | (199)
Net cash provided by (used in) financing activities | 7,345 | (1,759)
Effect of exchange rate changes on cash and cash equivalents | (149) | 117
Net increase (decrease) in cash and cash equivalents | 53,209 | (136,891)
Cash and cash equivalents as of beginning of period | 210,799 | 384,557
Cash and cash equivalents as of end of period | 264,008 | 247,666
Non-cash investing and financing activities |  |
Settlement of stock option exercise (shares withheld) | $ 1,334 |

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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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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 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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- 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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- Definition The value of shares withheld associated with the settlement of noncash stock option exercises. + References No definition available. + Details
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