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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Operating activities: |  |
Net income | $ 10,154 | $ 48,860
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Lower of cost or market reserve adjustment to inventory | 2,356 | 675
Depreciation and amortization | 14,291 | 8,929
Deferred income taxes, net | (381) | 2,638
Loss (gain) on disposal of assets | (5) | 40
Share-based compensation | 5,468 | 3,767
Unrealized foreign exchange gain | (1,254) | (254)
Changes in operating assets and liabilities: |  |
Accounts receivable, trade | 11,182 | (23,992)
Prepaid income tax | 781 |
Inventories | (21,614) | (6,357)
Other current assets | (1,489) | (4,845)
Accounts payable | 7,805 | 17,481
Accrued income taxes | (6,926) | 3,870
Accrued liabilities | (2,289) | (928)
Net cash provided by operating activities | 18,079 | 49,884
Investing activities: |  |
Maturities of short-term investments | 36 | 2
Purchase of property, plant and equipment | (30,895) | (26,687)
Purchase of land use rights | (5,591) |
Proceeds from disposal of equipment | 11 | 170
Deposits and prepaid for equipment | 1,444 | (3,838)
Purchase of intangible assets | (225) | (251)
Net cash used in investing activities | (35,220) | (30,604)
Financing activities: |  |
Proceeds from issuance of notes payable and long-term debt | 26,556 |
Principal payments of long-term debt and notes payable | (1,093) | (15,911)
Proceeds from line of credit borrowings | 79,953 |
Repayments of line of credit borrowings | (93,953) |
Repayments of bank acceptance payable |  | (307)
Exercise of stock options | 53 | 1,301
Payments of tax withholding on behalf of employees related to share-based compensation | (2,212) | (1,843)
Proceeds from common stock offering, net |  | 21,572
Net cash provided by financing activities | 9,304 | 4,812
Effect of exchange rate changes on cash | 1,832 | (177)
Net increase (decrease) in cash, cash equivalents and restricted cash | (6,005) | 23,915
Cash, cash equivalents and restricted cash at beginning of period | 83,948 | 51,964
Cash, cash equivalents and restricted cash at end of period | 77,943 | 75,879
Cash paid for: |  |
Interest | 255 | 539
Income taxes | 7,783 | 2,226
Non-cash investing and financing activities: |  |
Net change in accounts payable related to property and equipment additions | $ 214 | $ 535

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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: 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=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=96867065&loc=SL79508275-113901 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84161450&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591551-111686 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=84161450&loc=SL4573702-111684 + Details
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- Definition The cash outflow to settle a bank borrowing during the year. + 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=98514028&loc=d3e3291-108585 + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References No definition available. + Details
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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + 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=98514028&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + 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=98514028&loc=d3e3602-108585 + Details
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- Definition Amount of net unrealized gain (loss) related to the change in fair value of foreign currency exchange rate derivatives designated as cash flow hedging instruments. Recorded in accumulated other comprehensive income to the extent that the cash flow hedge is determined to be effective. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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