Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flow from operating activities:
Net income	$ 1,205	$ 3,846
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation	556	1,312
Provision for loss on doubtful accounts	87	243
Loss on sale of investments		8
Gain on sale of assets	(6)	(78)
Stock-based compensation	346	504
Insurance reserve	(212)	(93)
Changes in operating assets and liabilities:
Patient accounts receivable	(708)	(1,097)
Other accounts receivable	(1,699)	(975)
Prepaid expenses and other	(984)	449
Accounts payable	193	1,431
Deferred revenue, net of professional fees	(332)	(738)
Accrued liabilities and other	525	(319)
Net cash (used in) provided by operations	(1,029)	4,493
Cash flow from investing activities:
Purchases of property and equipment	(135)	(67)
Proceeds from sale of assets	11	127
Purchases of investment securities		(32,203)
Proceeds from sale of investment securities	2,804	32,929
Net cash provided by investing activities	2,680	786
Cash flow from financing activities:
Principal payments of loan		(731)
Shares repurchased for treasury stock	(231)	(357)
Proceeds from exercise of stock options		52
Net cash used in financing activities	(231)	(1,036)
Net effect of exchange rate changes on cash and cash equivalents	(97)	103
Increase in cash and cash equivalents	1,323	4,346
Cash and cash equivalents at beginning of period	31,653	18,568
Cash and cash equivalents at end of period	$ 32,976	$ 22,914