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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Cash flows from operating activities:      
Net loss $ (10,163) $ (9,263) $ (29,388)
Loss on discontinued operations (1,771) (2,522) (11,576)
Loss from continuing operations (8,392) (6,741) (17,812)
Adjustments to reconcile loss from continuing operations to net cash provided by (used in) operating activities:      
Depreciation and capital lease amortization 6,060 8,768 7,332
Impairment of goodwill 5,282
Gain on sale of facility (7,860)
Amortization of intangible assets 495 523 523
Amortization of debt issuance costs 168 166 598
Provision for doubtful accounts 638 289 (374)
Deferred income taxes (341) (4,750) (3,560)
(Gain) loss on disposal of property and equipment (51) 19 105
Share-based compensation expense 1,200 1,809 1,743
Excess tax benefit from stock compensation plans (19)
Adjustments to contingent consideration 27 (1,657) (211)
Unrealized loss on foreign currency forward contracts 90 170 295
Changes in operating assets and liabilities:      
Trade and other receivables (4,073) 80 15,717
Insurance settlements 2,625
Costs and estimated earnings in excess of billings on uncompleted contracts, net (278) 447 940
Inventories 1,543 5,728 9,934
Refundable income taxes (77) 3,254 1,285
Prepaid expenses and other assets (138) (630) 1,196
Accounts payable 2,128 1,048 (8,199)
Deferred revenue (271)
Accrued and other liabilities (4,792) (2,456) 3,694
Net cash provided by (used in) operating activities from continuing operations (5,793) (1,793) 20,823
Net cash provided by (used in) operating activities from discontinued operations (1,727) 3,312 34,383
Net cash provided by (used in) operating activities (7,520) 1,519 55,206
Cash flows from investing activities:      
Additions to property and equipment (2,851) (2,292) (6,831)
Proceeds from sale of business 4,300
Proceeds from sale of facility 13,914
Proceeds from sale of property and equipment 146 33 55
Collections on notes receivable 7,219
Net cash provided by (used in) investing activities from continuing operations (2,705) 11,655 4,743
Net cash provided by (used in) investing activities from discontinued operations 32,505 (1,684)
Net cash provided by investing activities 29,800 11,655 3,059
Cash flows from financing activities:      
Proceeds from issuance of common stock 1
Tax withholdings related to net share settlements of restricted stock and performance share awards (24) (31) (424)
Excess tax benefit from stock compensation plans 19
Borrowings on line of credit 79,250
Repayments on line of credit (124,837)
Payments of debt issuance costs (302)
Payments on capital lease obligations (327) (279) (1,270)
Payments of contingent consideration (112) (1,233)
Net cash used in financing activities from continuing operations (463) (1,543) (47,563)
Net cash used in financing activities from discontinued operations (111) (920)
Net cash used in financing activities (463) (1,654) (48,483)
Change in cash and cash equivalents 21,817 11,520 9,782
Cash and cash equivalents, beginning of period 21,829 10,309 527
Cash and cash equivalents, end of period 43,646 21,829 10,309
Supplemental disclosure of cash flow information:      
Cash paid during the period for interest, net of amounts capitalized 258 283 846
Cash received during the period for income taxes (net of refunds of $213, $3,427 and $7,949) (153) (3,322) (7,743)
Noncash investing and financing activities:      
Accrued property and equipment purchases 184 59 397
Capital lease additions 455 259 854
Proceeds from sale of facility placed in escrow $ 4,465