UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Trade accounts receivable, net of allowances for doubtful accounts	$ 6,536	$ 6,202
Other intangibles, net of accumulated amortization	$ 28,409	$ 26,175
Shareholders' equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock shares outstanding (in shares)	14,140,110	14,118,220
Treasury stock (in shares)	65,171	65,171
Series A Preferred Stock [Member]
Shareholders' equity:
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock ,voting rights	1/10th vote per share	1/10th vote per share
Preferred stock, liquidation preference (in dollars per share)	$ 112	$ 100
Preferred stock, authorized (in shares)	1,000,000	1,000,000
Preferred stock, issued (in shares)	1,122	1,122
Preferred stock, outstanding (in shares)	1,122	1,122
Series B Convertible Preferred Stock [Member]
Shareholders' equity:
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock ,voting rights	1/10th vote per share	1/10th vote per share
Preferred stock, Stated value (in dollars per share)	$ 100	$ 100
Preferred stock, liquidation preference (in dollars per share)	$ 1,500	$ 100
Preferred stock, authorized (in shares)	1,000,000	1,000,000
Preferred stock, issued (in shares)	15,000	15,000
Preferred stock, outstanding (in shares)	15,000	15,000