Condensed Consolidated Balance Sheets (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 19,545	$ 19,350
Short-term investments	26,616	31,947
Patient receivables, net of allowances of $1,124 and $1,392, respectively	2,209	2,256
Other accounts receivable, net	1,385	1,867
Prepaid expenses and other	4,196	5,641
Total current assets	53,951	61,061
Property and equipment	72,235	72,286
Accumulated depreciation and amortization	(60,754)	(57,322)
Property and equipment, net	11,481	14,964
Long-term investments	933	951
Patient receivables, net of allowances of $595 and $330 respectively	725	413
Other assets	2,036	3,092
Total assets	69,126	80,481
Liabilities and Stockholders' Investment
Accounts payable	6,799	8,110
Accrued liabilities and other	13,947	12,266
Deferred revenue	2,981	4,376
Debt obligations maturing within one year	2,937	3,039
Total current liabilities	26,664	27,791
Long-term rent obligations and other	2,685	3,368
Long-term debt obligations, less current portion	1,784	4,245
Insurance reserves	7,183	7,406
Deferred license fee	2,044	3,065
Deferred revenue	1,433	3,476
Stockholders' investment
Common stock ($.001 par value; 25,291,637 shares issued and 18,849,527 and 18,711,365 shares outstanding, respectively)	25	25
Contributed capital	176,869	175,610
Common stock in treasury, at cost (6,442,110 shares and 6,580,272 shares, respectively)	(112,974)	(114,033)
Retained deficit	(37,003)	(31,134)
Accumulated other comprehensive income	416	662
Total stockholders' investment	27,333	31,130
Total liabilities and stockholders' investment	$ 69,126	$ 80,481