Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Allowance for doubtful accounts (in Dollars)	$ 430	$ 82
Accumulated depreciation (in Dollars)	18,239	15,767
Accumulated amortization (in Dollars)	$ 3,385	$ 3,203
Common stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	23,644,301	24,213,467
Common stock outstanding	23,644,301	24,213,467