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Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Cash flows from operating activities:    
Net income $ 8,272 $ 2,105
Loss from discontinued operations (40) (200)
Income from continuing operations 8,312 2,305
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 1,399 1,758
Non cash interest expense included in net income 91 108
Gain on sale of operating plant and equipment 0 (396)
Share based compensation expense 693 885
Bad debt expense (recoveries) 402 (71)
Inventory reserve expense 269 192
Deferred income tax benefit 513 (399)
Changes in operating assets and liabilities:    
Accounts receivable 3,261 (2,950)
Costs and estimated earnings in excess of billings on uncompleted contracts (2,298) 2,336
Inventories (181) (135)
Prepaid expenses and other current assets (330) 521
Deferred charges and other assets (109) 216
Accounts payable and accrued expenses (3,676) (1,905)
Billings in excess of costs and estimated earnings on uncompleted contracts 1,837 (2,563)
Income taxes payable (1,253) 1,646
Other liabilities (228) 380
Net cash provided by continuing operating activities 8,702 1,928
Net cash provided by discontinued operating activities 36 1,010
Net cash provided by operating activities 8,738 2,938
Cash flows from investing activities:    
Acquisitions of property and equipment (913) (654)
Net proceeds from sale of equipment and plant (including $57 from discontinued operations in 2010) 714 5,158
Net cash (used in) provided by investing activities (199) 4,504
Cash flows from financing activities:    
Net repayments on revolving credit line   (457)
Proceeds from exercise of stock options 112 11
Cash paid for deferred financing costs   (347)
Cash paid for repurchase of common shares (991)  
Repayments of term debt   (2,250)
Dividends paid to common shareholders (728)  
Net cash used in financing activities (1,607) (3,043)
Net increase in cash and cash equivalents 6,932 4,399
Cash and cash equivalents at beginning of year 5,792 1,393
Cash and cash equivalents at end of year 12,724 5,792
Non-Cash Investing and Financing Activities:    
Conversion of subordinated debt to common stock 1,200  
Supplemental Disclosures of Cash Flow Information:    
Interest 1,047 1,097
Income taxes $ 4,793 $ (247)