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Condensed Consolidated Statements of Cash Flows (USD $) | 6 Months Ended
--- | ---
Jun. 30, 2014 | Jun. 30, 2013
Cash flows from operating activities: |  |
Net income | $ 7,102,525 | $ 6,877,423
Adjustments to reconcile net income to net cash provided by (used in) operating activities: |  |
Depreciation and amortization | 1,855,392 | 1,508,943
Stock-based compensation expense | 852,637 | 562,762
Deferred tax expense | 153,704 | 992,856
Loss (gain) on revaluation of contingent consideration | 116,020 | (18,587)
Loss on disposal of assets | 2,640 |
Changes in assets and liabilities: |  |
Accounts receivable | (2,547,815) | (814,837)
Royalties and other receivables | 6,354,278 | 3,817,118
Inventories | (286,261) | 360,872
Prepaid expenses and other current assets | (300,432) | (334,937)
Accounts payable | 2,069,947 | (958,014)
Accrued liabilities | (4,844,919) | 592,030
Long-term liabilities | (207,390) | (194,945)
Net cash provided by operating activities | 10,320,326 | 12,390,684
Cash flows from investing activities: |  |
Purchases of marketable securities | (18,635,241) | (18,088,695)
Redemptions of marketable securities | 24,491,993 | 13,383,003
Acquisition of assets of Refine Technology, LLC | (21,235,937) |
Increase in restricted cash | (250,000) |
Purchases of property, plant and equipment | (1,224,091) | (1,105,217)
Net cash used in investing activities | (16,853,276) | (5,810,909)
Cash flows from financing activities: |  |
Exercise of stock options | 1,337,906 | 2,034,545
Net cash provided by financing activities | 1,337,906 | 2,034,545
Effect of exchange rate changes on cash and cash equivalents | (878,891) | (492,563)
Net (decrease) increase in cash and cash equivalents | (6,073,935) | 8,121,757
Cash and cash equivalents, beginning of period | 39,829,653 | 29,209,821
Cash and cash equivalents, end of period | 33,755,718 | 37,331,578
Supplemental disclosure of non-cash investing activities: |  |
Income taxes paid | $ 668,000 | $ 771,000

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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 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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- Details
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