Thank you, Craig. For the 3 months ended June 30, 2015, medical services revenue increased 30% to $4,394,000 compared to medical services revenue of $3,379,000 for the second quarter of 2014. Revenue for last year's second quarter included the company's operations in Turkey, which were sold effective May 31, 2014. Excluding prior year's revenue in Turkey, medical services revenue increased 38.2% for the second quarter of 2015 compared to the second quarter of 2014.
The company incurred a net loss of $1,970,000 or $0.36 per share for the second quarter solely attributable to an impairment charge of $2,114,000 or $0.39 per share related to AMS' strategic equity investment in Mevion Medical Systems. Excluding this charge, the company would have reported net income of $144,000 or $0.03 per share for the quarter. This compares to a net loss for the second quarter of 2014 of $927,000 or $0.20 per share, which included a pretax loss on the sale of the Turkey subsidiary at $572,000 and a pretax gain from foreign currency transactions of $146,000 due to the strengthening of the Turkish lira against the U.S. dollar.
The total number of procedures performed in AMS' U.S. Gamma Knife business increased 27.6% for the second quarter compared to the same period of 2014, excluding procedures performed in Turkey. Medical services gross margin for the second quarter of 2015 increased to 41% compared to medical services gross margin of 25% for the second quarter of 2014, primarily as a result of increased treatment volume, higher Medicare reimbursement for certain Gamma Knife procedures and lower costs due to the sale of the Turkish subsidiary.
Operating income increased to $478,000 for the second quarter of 2015 compared to an operating loss of $602,000 for the same period a year earlier. Pretax income, net of income attributable to noncontrolling interests, increased to $250,000, excluding the impairment charge for the second quarter of 2015 compared to a pretax loss of $893,000 for the second quarter of 2014.
Selling and administrative expenses for the second quarter of 2015 increased to $979,000 compared to $937,000 for the second quarter of 2014, primarily due to higher legal and audit fees. As Craig mentioned, interest expense decreased due to the payoff of our line of credit in January, the sale of EWRS Turkey in May 2014 and the pay-down of one of the company's existing debt obligations at the end of 2014.
For the 6 months ended June 30, 2015, medical services revenue increased 14.3% to $8,511,000 compared to medical services revenue of $7,443,000 for the first 6 months of 2014. Excluding prior year's revenue in Turkey, medical services revenue increased 23.1% for this year's first half compared to the first half of 2014.
The company incurred a net loss of $1,842,000 or $0.34 per share for the first half. The loss was solely attributable to the impairment charge of $2,114,000 or $0.39 per share related to AMS' equity investment in Mevion. Excluding this charge, the company would have reported net income of $272,000 or $0.05 per share for the first -- for the 6 months. This compares to a net loss for the first half of 2014 of $1,023,000 or $0.22 per share, which included a pretax loss on the sale of the Turkey subsidiary of $572,000 and a pretax gain on foreign currency transaction of $161,000.
The total number of procedures performed in AMS' U.S. Gamma Knife business increased 17.4% for the first 6 months of 2015 compared to the same period of 2014, excluding procedures performed in Turkey. Operating income increased to $934,000 for the first half of 2015 compared to an operating loss of $705,000 for last year's first half.
On the balance sheet, at June 30, 2015, cash and cash equivalents were $1,798,000 compared to $1,059,000 at December 31, 2014. As of December 31, 2014, AMS had a $9 million renewable line of credit with a bank secured by a certificate of deposit. This line was paid in full on January 2, 2015, using the proceeds from the certificate of deposit. As a result, current liabilities decreased to $8,902,000 at June 30, 2015, compared to $16,251,000 at December 31, 2014. Shareholders' equity at June 30, 2015, was $24,602,000 or $4.59 per outstanding share. This compares to shareholders' equity at December 31, 2014, of $26,154,000 or $4.88 per outstanding share. Craig?