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Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Cash flows from operating activities: |  |  |
Net income (loss) | $ (52,982,000) | $ (19,342,000) | $ 23,840,000
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 17,771,000 | 15,891,000 | 15,692,000
Asset impairments | 3,872,000 | 0 | 0
Amortization of net premium (discount) on available-for-sale investments | (100,000) | (50,000) | 425,000
Net (gain) loss on long-term investments | (11,434,000) | 4,050,000 | (4,685,000)
Net (gain) loss on disposal of property, plant and equipment | 67,000 | 67,000 | (145,000)
Gain on bargain purchase of a business |  | (11,322,000) |
Gain on contingency payment | (1,230,000) |  |
Gain on life insurance proceeds | (1,000,000) |  |
Stock-based compensation expense | 6,962,000 | 7,155,000 | 7,433,000
Deferred income taxes | 30,070,000 | (17,257,000) | 14,073,000
Change in operating assets and liabilities: |  |  |
Accounts receivable, net | 8,282,000 | 49,200,000 | (49,103,000)
Other receivables | 20,046,000 | (8,522,000) | (10,222,000)
Inventory, net | 1,252,000 | 24,192,000 | (15,518,000)
Prepaid expenses and other assets | 2,749,000 | 10,727,000 | (4,830,000)
Accounts payable, net | (13,494,000) | (3,799,000) | (17,742,000)
Accrued expenses and other liabilities | (4,598,000) | (3,226,000) | (5,455,000)
Income taxes payable | (8,705,000) | 7,690,000 | 3,858,000
Net cash provided by (used in) operating activities | (2,472,000) | 55,454,000 | (42,379,000)
Cash flows from investing activities: |  |  |
Purchases of property, plant and equipment | (9,494,000) | (8,110,000) | (14,720,000)
Proceeds from disposals of property, plant and equipment |  |  | 151,000
Proceeds from sales and maturities of available-for-sale investments | 47,268,000 | 153,649,000 | 173,752,000
Purchases of available-for-sale investments | (48,578,000) | (123,209,000) | (93,141,000)
Life insurance proceeds received | 1,000,000 |  |
Acquisition of business, net of cash acquired | 13,000 | (22,045,000) |
Net cash provided by (used in) investing activities | (9,791,000) | 285,000 | 66,042,000
Cash flows from financing activities: |  |  |
Proceeds from stock option exercises | 526,000 | 1,483,000 | 13,412,000
Purchases of treasury stock | (184,000) | (15,532,000) | (17,348,000)
Dividend payments | (17,212,000) | (17,267,000) | (17,368,000)
Payments on long-term debt | (1,000,000) | (1,100,000) | (1,100,000)
Net cash used in financing activities | (17,870,000) | (32,416,000) | (22,404,000)
Net increase (decrease) in cash and cash equivalents | (30,133,000) | 23,323,000 | 1,259,000
Effect of exchange rate changes | (1,598,000) | (4,252,000) | 5,279,000
Cash and cash equivalents, beginning of year | 105,504,000 | 86,433,000 | 79,895,000
Cash and cash equivalents, end of year | 73,773,000 | 105,504,000 | 86,433,000
Supplemental disclosure of cash flow information |  |  |
Cash paid during the year for interest | 512,000 | 534,000 | 555,000
Cash paid during the year for income taxes | 9,357,000 | 4,104,000 | 2,988,000
Supplemental disclosure of non-cash investing activities |  |  |
Purchases of property, plant and equipment included in accounts payable | $ 90,000 | 62,000 | $ 408,000
Contingent payment |  | $ 1,230,000 |

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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3521-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition The value of an asset or business acquired in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3151-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26853-111562 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition Amount of cash inflow for proceeds from settlement of corporate-owned life insurance policy, classified as investing activities. Includes, but is not limited to, bank-owned life insurance policy. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21C -URI http://asc.fasb.org/extlink&oid=118932676&loc=SL94080552-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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- Definition Amount of cash inflow from exercise of option under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116856206&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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