Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 610	$ 460
Accumulated depreciation	18,978	19,421
Accumulated amortization	$ 4,692	$ 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)	22,472,381	22,111,675
Common stock outstanding (in Shares)	22,374,873	22,102,549
Treasury stock (in Shares)	97,365	9,126