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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Operating activities: |  |  |
Net income (loss) | $ 3,515 | $ (25,364) | $ 15,320
Adjustments to reconcile net (loss) income to net cash provided by operating activities: |  |  |
Depreciation | 25,448 | 26,204 | 26,436
Amortization of deferred revenue | (5,223) | 0 | 0
Asset impairment | 0 | 7,202 | 3,200
Allowance for doubtful accounts | 493 | 448 | 3,168
(Gain) loss on the sale of assets | (757) | (10) | 86
Deferred income taxes | 1,409 | (14,061) | 8,264
Stock-based compensation expense | 3,125 | 2,707 | 1,139
Changes in operating assets and liabilities: |  |  |
Contracts receivable, net | 28,067 | 31,740 | 15,074
Contracts in progress | (13,984) | 14,167 | (2,262)
Advance billings on contracts | (3,197) | (11,685) | (16,240)
Accounts payable | (12,757) | (26,668) | (25,782)
Prepaid expenses and other assets | 230 | 1,092 | 352
Inventory | 6,501 | 931 | 1,189
Accrued contract losses | (9,108) | 8,678 | 817
Deferred revenue | (11,656) | 0 | 0
Deferred compensation | 305 | 0 | 0
Accrued expenses | 2,003 | (5,381) | 1,334
Current income taxes | (63) | 615 | 15
Net cash provided by operating activities | 14,351 | 10,615 | 32,110
Cash flows from investing activities: |  |  |
Cash received in acquisition | 3,035 | 0 | 0
Capital expenditures, net | (6,795) | (6,018) | (27,658)
Proceeds from the sale of equipment | 6,458 | 11 | 929
Net cash provided by (used in) investing activities | 2,698 | (6,007) | (26,729)
Cash flows from financing activities: |  |  |
Borrowings against notes payable | 0 | 0 | 22,000
Payments on notes payable | 0 | 0 | (22,000)
Payment of financing costs | (122) | 0 | 0
Payments of dividends on common stock | (588) | (5,865) | (5,865)
Net cash used in financing activities | (710) | (5,865) | (5,865)
Net increase (decrease) in cash and cash equivalents | 16,339 | (1,257) | (484)
Cash and cash equivalents at beginning of period | 34,828 | 36,085 | 36,569
Cash and cash equivalents at end of period | 51,167 | 34,828 | 36,085
Supplemental cash flow information: |  |  |
Interest paid | 332 | 165 | 169
Income taxes paid (refunds received), net | 377 | (152) | 225
Schedule of noncash financing activities |  |  |
Reclassification of property, plant and equipment to assets held for sale | 0 | 4,805 | 0
Reclassification of assets held for sale to inventory | $ 0 | $ 3,727 | $ 0

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- Definition The cash inflow from sale of machinery and equipment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 + Details
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- Definition Nonrecurring impairment charges related to the write-off of production-related equipment and inventory. This tag is used when an Entity charges this cost to cost of goods sold. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. For cash flows, this element primarily pertains to amortization of deferred credits on long-term arrangements. As a noncash item, it is deducted from net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 13.A.3) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 13.A.4) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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- Definition The cash outflow for a borrowing supported by a written promise to pay an obligation. + 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 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + 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=66902209&loc=d3e3602-108585 + Details
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- References No definition available. + Details
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