Description of Business and Accounting Policies (Details) (USD $)	3 Months Ended		9 Months Ended			9 Months Ended	12 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Centres	Sep. 30, 2011	Dec. 31, 2011	Sep. 30, 2012 Patient receivable [Member]	Dec. 31, 2011 Patient receivable [Member]	Sep. 30, 2012 Maximum [Member]	Sep. 30, 2012 Minimum [Member]
Description of Business and Accounting Policies (Textual) [Abstract]
Period over which patient receivables are recovered								36 months	12 months
Doubtful accounts on our patient receivables			$ 704,000	$ 554,000		$ 1,700,000	$ 1,700,000
Description of Business and Accounting (Additional Textual) [Abstract]
Number of vision correction centers operated			53
Number of vision correction centers licensed to supplier who use trade mark			2
Receivable balances that remain open past maturity amount	101,000		101,000		160,000
Receivables wrote-off against the allowance for doubtful	296,000	210,000	710,000	576,000
Receivables recovered which were previously written off	$ 40,000	$ 23,000	$ 102,000	$ 110,000