Statements Of Operations (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Statements Of Operations [Abstract]
Services revenues	$ 15,032,000	$ 27,231,000	$ 26,666,000
Products revenues	2,201,000	2,776,000	2,104,000
Total Net Sales	17,233,000	30,007,000	28,770,000
Cost of services	10,903,000	12,983,000	12,014,000
Cost of goods sold	1,512,000	1,853,000	1,415,000
Total Cost of Sales	12,415,000	14,836,000	13,429,000
Gross Profit	4,818,000	15,171,000	15,341,000
Operating Expenses:
Selling	5,753,000	7,082,000	6,632,000
Marketing	1,700,000	1,635,000	1,540,000
General and administrative	5,495,000	5,549,000	4,811,000
Insurance settlement proceeds			(1,387,000)
Gain from litigation settlement, net	(89,762,000)
Total Operating Expenses	(76,814,000)	14,266,000	11,596,000
Operating Income	81,632,000	905,000	3,745,000
Other Income (Expense):
Interest income	63,000	39,000	127,000
Interest expense		(22,000)	(40,000)
Other expense, net			(1,000)
Total Other Income	63,000	17,000	86,000
Income Before Income Taxes	81,695,000	922,000	3,831,000
Income tax benefit (expense)	(30,606,000)	5,674,000	(115,000)
Net Income	$ 51,089,000	$ 6,596,000	$ 3,716,000
Net income per share:
Basic	$ 3.35	$ 0.42	$ 0.25
Diluted	$ 3.29	$ 0.39	$ 0.23
Shares used in calculation of net income per share:
Basic	15,229,000	15,589,000	15,139,000
Diluted	15,512,000	16,925,000	15,846,000
Cash dividends declared per common share:	$ 2.00	$ 0.00	$ 0.00