Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Allowance for accounts receivable	$ 74	$ 75
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	4,855,000	4,855,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Treasury stock, shares	1,495,159	1,495,159
Series A Preferred Stock
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	110,000	110,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common Stock Voting
Common stock, par value	$ 0.003	$ 0.003
Common stock, shares authorized	110,000,000	110,000,000
Common stock, shares issued	39,001,403	38,902,294
Common stock, shares outstanding	37,506,244	37,407,135
Common Stock Non-Voting
Common stock, par value	$ 0.003	$ 0.003
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued
Common stock, shares outstanding