Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Allowance for doubtful accounts (in Dollars)	$ 658	$ 460
Accumulated depreciation (in Dollars)	18,400	19,421
Accumulated amortization (in Dollars)	$ 4,481	$ 4,270
Common stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in Shares)	40,000,000	40,000,000
Common stock, shares issued (in Shares)	22,193,204	22,111,675
Common stock outstanding (in Shares)	22,161,283	22,102,549