Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Patient receivables, allowances, current (in Dollars)	$ 855	$ 1,019
Patient receivables, allowances, noncurrent (in Dollars)	$ 552	$ 634
Common stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Common stock, shares issued and 19,247,765 and 19,050,504 shares outstanding, respectively) (in Shares)	25,291,637	25,291,637
Common stock, shares outstanding (in Shares)	19,247,765	19,050,504
Common stock in treasury, shares (in Shares)	6,043,872	6,241,133