Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Property and equipment, accumulated depreciation and amortization (in Dollars)	$ 12,810	$ 12,524
Leased property under capital leases, accumulated depreciation and amortization (in Dollars)	$ 3,023	$ 2,905
Common Class A [Member]
Par Value	$ 0.01	$ 0.01
Common Class B [Member]
Par Value	$ 0.01	$ 0.01