Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Accounts receivable, allowance for uncollectibles	$ 391	$ 638
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized shares	10,000,000	10,000,000
Common stock, issued shares	6,976,942	6,576,542
Treasury stock, common shares	823,482	817,700
Preferred Stock 100 Par Value [Member]
Preferred shares, par value	$ 100	$ 100
Preferred shares, authorized shares	5,000	5,000
Preferred shares, issued shares	5,000	5,000
Preferred Stock 0.01 Par Value [Member]
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, authorized shares	10,000,000	10,000,000
Preferred shares, unissued shares	10,000,000	10,000,000