| http://www.w3.org/ns/prov#value | - The decrease in sales and marketing expense for the first quarter ended March 31, 2012 as compared to the first quarter ended March 31, 2011 was primarily due to decreased compensation, benefits, and other related costs of $198,000 mainly due to decreased sales and marketing headcount and benefits, partially offset by increased marketing, advertising, and public relations costs of $84,000 due to c
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