Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Allowance for doubtful accounts (in Dollars)	$ 424	$ 430
Accumulated depreciation (in Dollars)	19,315	18,239
Accumulated amortization (in Dollars)	$ 3,836	$ 3,385
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)	22,184,868	23,644,301
Common stock outstanding (in Shares)	22,184,868	23,644,301