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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 $ 8,190 $ 10,526
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 4,523 3,942
Deferred income taxes (782) 570
Mark-to-market of interest rate swaps (64) 35
Share-based compensation 410 382
Loss on translation of foreign currency financial statements 4 132
Change in operating assets and liabilities:    
Accounts receivable 7,425 (7,302)
Inventories 1,444 (2,999)
Prepaid and other assets (558) (80)
Accounts payable (2,099) 2,159
Accrued and other liabilities (3,864) 4,304
Post retirement benefits liability 169 (194)
Net cash provided by operating activities 14,798 11,475
Cash flows from investing activities:    
Purchase of property, plant and equipment (8,258) (8,806)
Proceeds from sale of property and equipment 777 0
Net cash used in investing activities (7,481) (8,806)
Cash flows from financing activities:    
Gross borrowings on revolving line of credit (47,369) 0
Gross borrowings on revolving line of credit 47,369 0
Payment of principal on Mexican loan (1,600) (1,600)
Payment of principal on capex loan (1,714) (1,714)
Payment of principal on term loan 0 (107)
Payment of principal on industrial development revenue bond (790) (730)
Excess tax benefit from equity incentive plans 163 322
Payments related to the purchase of treasury stock (253) (241)
Proceeds from issuance of common stock 81 378
Net cash used in financing activities (4,113) (3,692)
Net change in cash and cash equivalents 3,204 (1,023)
Cash and cash equivalents at beginning of period 4,634 5,657
Cash and cash equivalents at end of period 7,838 4,634
Cash paid for:    
Interest (net of amounts capitalized) 284 557
Income taxes 4,734 4,731
Non Cash:    
Fixed asset purchases in accounts payable $ 241 $ 1,086