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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Cash flow from operating activities:    
Net income (loss) $ (382) $ 4,467
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 1,913 1,883
Stock-based compensation 489 582
Deferred income taxes (2,049) 279
Pension cost 257 265
Changes in operating assets and liabilities:    
Accounts receivable 3,419 2,786
Prepaid expenses and other current assets 342 623
Other assets (143) (383)
Accounts payable and accrued expenses (389) 83
Accrued salaries, wages and related benefits (1,321) (6)
Restricted shares withheld for taxes (31) 0
Income and other taxes (435) (392)
Net cash provided by operating activities 1,670 10,187
Cash flow from investing activities:    
Capital expenditures (2,971) (4,503)
Sale of investments - other 318 3,224
Net cash used in investing activities (2,653) (1,279)
Cash flow from financing activities:    
Proceeds from exercise of stock options 131 470
Payment of long term obligations (194) (35)
Net cash provided by (used in) financing activities (63) 435
Net increase (decrease) in cash and cash equivalents (1,046) 9,343
Cash and cash equivalents, beginning of period 25,425 11,389
Cash and cash equivalents, end of period 24,379 20,732
Supplemental disclosures of cash flow information:    
Cash paid for income taxes $ 663 $ 1,039