Industrial Services of America Inc. reported a second-quarter net loss of $1.2 million, or 18 cents per share, diluted, compared with net income of $312,574, or 5 cents per share, a year earlier. Revenue for the quarter fell to $49.9 million from $65.1 million. Louisville-based Industrial Services (NASDAQ: IDSA) buys, processes and markets metals and other recyclable commodities and offers waste-management services for businesses. “Contracting margins and lower volumes contributed to a weak second…