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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Cash flows from operating activities: |  |
Net income | $ 10,850 | $ 8,272
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 1,250 | 1,399
Non cash interest expense included in net income | 227 | 91
Gain on sale of operating plant and equipment | (70) |
Share based compensation expense | 662 | 693
Bad debt expense | 176 | 402
Inventory reserve expense | 102 | 269
Deferred income tax expense | 454 | 513
Changes in operating assets and liabilities, net of acquisition: |  |
Accounts receivable | (5,089) | 3,261
Inventories | 458 | (181)
Costs and estimated earnings in excess of billings on uncompleted contracts | 4,823 | (2,298)
Prepaid expense and other current assets | 527 | (330)
Deferred charges and other assets | 203 | (109)
Accounts payable and accrued expenses | 319 | (3,676)
Billings in excess of costs and estimated earnings on uncompleted contracts | 1,303 | 1,837
Income taxes payable | 465 | (1,253)
Other liabilities | 169 | (152)
Net cash provided by operating activities | 16,829 | 8,738
Cash flows from investing activities: |  |
Acquisitions of property and equipment | (273) | (913)
Net cash paid for acquisition | (4,000) |
Net proceeds from sale of equipment | 382 | 714
Net cash used in investing activities | (3,891) | (199)
Cash flows from financing activities: |  |
Proceeds from exercise of stock options | 248 | 112
Cash paid for repurchase of common shares | (456) | (991)
Dividends paid to common shareholders | (2,460) | (728)
Net cash used in financing activities | (2,668) | (1,607)
Net increase in cash and cash equivalents | 10,270 | 6,932
Cash and cash equivalents at beginning of year | 12,724 | 5,792
Cash and cash equivalents at end of year | 22,994 | 12,724
Supplemental Schedule of Non-Cash Investing and Financing Activities: |  |
Conversion of subordinated debt to common stock | 9,600 | 1,200
Common stock issued in business acquisition | 521 |
Cash paid (received) during the year for: |  |
Interest | 946 | 1,047
Income taxes | $ 2,637 | $ 4,793

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