Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flow from operating activities:
Net loss	$ (2,893)	$ (4,546)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation	3,743	4,346
Provision for loss on doubtful accounts	704	554
Loss on sale of investments	8	9
Impairment charges	37
Gain on sale of assets	(221)	(498)
Stock-based compensation	1,531	1,259
Insurance reserve	(318)	(223)
Changes in operating assets and liabilities:
Patient accounts receivable	(1,719)	(754)
Other accounts receivable	(60)	138
Prepaid expenses and other	870	896
Accounts payable	(2,660)	(1,311)
Deferred revenue, net of professional fees	(1,838)	(3,094)
Accrued liabilities and other	(2,144)	771
Net cash used in operations	(4,960)	(2,453)
Cash flow from investing activities:
Purchases of property and equipment	(973)	(869)
Proceeds from sale of assets	283	1,252
Purchases of investment securities	(39,659)	(137,480)
Proceeds from sale of investment securities	62,064	142,716
Net cash provided by investing activities	21,715	5,619
Cash flow from financing activities:
Principal payments of loan	(4,004)	(2,563)
Shares repurchased for treasury stock	(357)	(288)
Proceeds from exercise of stock options	57	23
Net cash used in financing activities	(4,304)	(2,828)
Net effect of exchange rate changes on cash and cash equivalents	167	(143)
Increase in cash and cash equivalents	12,618	195
Cash and cash equivalents at beginning of period	18,568	19,350
Cash and cash equivalents at end of period	$ 31,186	$ 19,154