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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Cash flow from operating activities:    
Net income $ 103 $ 2,814
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 891 925
Stock-based compensation 278 279
Deferred income taxes (923) 256
Pension cost 224 159
Changes in operating assets and liabilities:    
Accounts receivable 4,077 2,623
Prepaid expenses and other current assets (25) 463
Other assets (36) (481)
Accounts payable and accrued expenses (484) 434
Accrued salaries, wages and related benefits (1,015) (18)
Restricted shares withheld for taxes (31) 0
Income and other taxes 74 272
Net cash provided by operating activities 3,133 7,726
Cash flow from investing activities:    
Capital expenditures (913) (2,104)
Sale (purchase) of investments - other (501) 1,023
Net cash used in investing activities (1,414) (1,081)
Cash flow from financing activities:    
Proceeds from exercise of stock options 131 260
Payment of long term obligations (128) (70)
Net cash provided by financing activities 3 190
Net increase in cash and cash equivalents 1,722 6,835
Cash and cash equivalents, beginning of period 25,425 11,389
Cash and cash equivalents, end of period 27,147 18,224
Supplemental disclosures of cash flow information:    
Cash paid for income taxes $ 347 $ 369