Consolidated Balance Sheets Parenthetical (Parentheticals) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Allowance for doubtful accounts receivable, current	$ 50,000	$ 40,000
Preferred stock, par value per share	$ 1	$ 1
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Common stock, par or stated value per share	$ 0.01	$ 0.01
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares, issued	3,926,491	3,926,491
Common stock, shares, outstanding	2,731,839	2,722,239
Treasury stock, shares	1,194,652	1,204,252