CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Allowance for Doubtful Accounts, Healthcare Receivables	$ 31,780	$ 25,345
Allowance for Doubtful Accounts, Other Receivables	$ 201	$ 268
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	34,023,053	33,406,364
Common stock, shares outstanding	34,023,053	33,406,364