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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2017 | Sep. 30, 2016
Cash flows from operating activities: |  |
Net income (loss) | $ (20,488) | $ 7,069
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities: |  |
Bad debt expense | 19 | 422
Depreciation and amortization | 10,141 | 19,262
Amortization of deferred revenue | (2,397) | (4,114)
Asset impairment | 389 | 0
Loss (gain) on sale of assets | 224 | (924)
Deferred income taxes | (10,235) | 3,651
Compensation expense - restricted stock | 2,636 | 2,452
Changes in operating assets and liabilities: |  |
Contracts receivable and retainage, net | (5,363) | 22,287
Contracts in progress | (15,981) | (5,834)
Prepaid expenses, inventory, and other current assets | (26) | 1,050
Accounts payable | 12,436 | (13,654)
Advance billings on contracts | 390 | (20)
Deferred revenue | (5,825) | (8,928)
Deferred compensation | 590 | 0
Accrued expenses and other liabilities | 2,336 | 4,713
Accrued contract losses | 1,595 | (8,001)
Net cash (used in) provided by operating activities | (29,559) | 19,431
Cash flows from investing activities: |  |
Capital expenditures | (4,515) | (5,415)
Net cash received in acquisition | 0 | 1,588
Proceeds from the sale of equipment | 2,120 | 5,813
Net cash (used in) provided by investing activities | (2,395) | 1,986
Cash flows from financing activities: |  |
Tax payments made on behalf of employees from withheld, vested shares of common stock | (885) | (163)
Payment of financing cost | (88) | 0
Payments of dividends on common stock | (448) | (440)
Proceeds received from borrowings under our line of credit | 2,000 | 0
Repayment of borrowings under our line of credit | (2,000) | 0
Net cash used in financing activities | (1,421) | (603)
Net change in cash and cash equivalents | (33,375) | 20,814
Cash and cash equivalents at beginning of period | 51,167 | 34,828
Cash and cash equivalents at end of period | $ 17,792 | $ 55,642

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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
Name: | us-gaap_ShareBasedCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration