Condensed Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Accounts receivable, allowance for doubtful accounts (in Dollars) (in Dollars)	$ 475	$ 487
Property, plant and equipment, accumulated depreciation (in Dollars)	$ 4,013	$ 3,750
Preferred stock par value (in Dollars per share) (in Dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000	1,000
Preferred stock, shares outstanding	0	0
Common stock, par value (in Dollars per share) (in Dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	25,000	25,000
Common stock, issued shares	16,832	16,782
Common stock, outstanding shares	14,101	14,051
Common shares in treasury, shares	2,731	2,731