DTSI: Common stock-$0.0001 par value, 70,000 shares authorized at June 30, 2011 and December 31, 2010; 20,461 and 20,325 shares issued at June 30, 2011 and December 31, 2010, respectively; 17,161 and 17,325 shares outstanding at June 30, 2011 and December 31, 2010, respectively