Regulatory Requirement	12 Months Ended
Dec. 31, 2015
Regulatory Requirement
Regulatory Requirement	16. Regulatory Requirement As of December 31, 2015, two subsidiaries of the Company are subject to the SEC Uniform Net Capital Rule 15c3-1, which requires the maintenance of minimum net capital of $1.0 million for each of the two broker-dealer subsidiaries. At December 31, 2015, the subsidiaries had net capital of approximately $64.2 million and $8.5 million, which was approximately $63.2 million and $7.5 million in excess of its required net capital of $1.0 million and $1.0 million, respectively. At December 31, 2014, the subsidiaries had net capital of approximately $59.8 million and $8.1 million, which was approximately $58.8 million and $7.1 million in excess of its required net capital of $1.0 million and $1.0 million, respectively. Pursuant to NYSE and NYSE MKT (formerly NYSE Amex) rules, the Company was also required to maintain $1.9 million and $3.7 million of capital in connection with the operation of the Company's Designated Market Maker (“DMM”) business as of December 31, 2015 and 2014, respectively. The required amount is determined under the exchange rules as the greater of $1 million or 15% of the market value of 60 trading units for each symbol in which the Company is registered as the DMM.

16. Regulatory Requirement

As of December 31, 2015, two subsidiaries of the Company are subject to the SEC Uniform Net Capital Rule 15c3-1, which requires the maintenance of minimum net capital of $1.0 million for each of the two broker-dealer subsidiaries. At December 31, 2015, the subsidiaries had net capital of approximately $64.2 million and $8.5 million, which was approximately $63.2 million and $7.5 million in excess of its required net capital of $1.0 million and $1.0 million, respectively. At December 31, 2014, the subsidiaries had net capital of approximately $59.8 million and $8.1 million, which was approximately $58.8 million and $7.1 million in excess of its required net capital of $1.0 million and $1.0 million, respectively.

Pursuant to NYSE and NYSE MKT (formerly NYSE Amex) rules, the Company was also required to maintain $1.9 million and $3.7 million of capital in connection with the operation of the Company's Designated Market Maker (“DMM”) business as of December 31, 2015 and 2014, respectively. The required amount is determined under the exchange rules as the greater of $1 million or 15% of the market value of 60 trading units for each symbol in which the Company is registered as the DMM.