Thanks, Craig. For the 3 months ended June 30, 2012, revenue increased 1.9% to $4,284,000 compared to $4,206,000 for the second quarter of 2011. The number of procedures performed on Gamma Knife Perfexion systems supplied by AMS increased 3.8% for the second quarter and 4.1% for the first 6 months of 2012 compared to the same periods of 2011. The total number of procedures performed in AMS Gamma Knife business increased 17.1% for this year's second quarter and 10.9% for the first 6 months compared to the same periods of 2011, primarily reflecting the opening of a new Gamma Knife site in Turkey earlier this year.
The incremental revenue generated from the growth in procedure volume was partially offset by the loss of revenue from the expiration of a customer contract at one of our sites and the early termination in the third quarter of 2011 of the existing 10-year lease on the Gamma Knife system AMS supplied to Lehigh Valley Hospital. Lehigh's impact on the revenue comparisons will diminish significantly in the second half, as it made a smaller contribution to last year's third quarter, and we recognized 0 revenue from Lehigh in last year's fourth quarter.
Net income for the second quarter of 2012 was $15,000 or $0.00 per diluted share. This compares to net income of $21,000 or $0.00 per diluted share for the second quarter of 2011. Gross margin for this year's second quarter was unchanged compared to the second quarter of 2011 at 43.7% and increased sequentially compared to gross margin of 41.7% for the first quarter of 2012 and 39.5% for the fourth quarter of 2011. Selling and administrative expenses for the second quarter of 2012 were $1,109,000 compared to the $1,041,000 for the second quarter of 2011. Operating income for this year's second quarter was unchanged compared to the second quarter of 2011 at $225,000. For the 6 months ended June 30, 2012, revenue increased to $8,687,000 compared to $8,573,000 for the first 6 months of 2011. Net income for the first 6 months of 2012 was $24,000 or $0.01 per diluted share compared to net income for the first 6 months of 2011 of $42,000 or $0.01 per diluted share.
Cash flow, as measured by earnings before interest taxes, depreciation and amortization or EBITDA, was $1,988,000 for the second quarter and $4,127,000 for the first 6 months of 2012 compared to $2,034,000 for the second quarter and $4,081,000 for the first 6 months of 2011.
On the balance sheet at June 30, 2012, cash, cash equivalents and certificates of deposit were $9,997,000 compared to $11,580,000 at December 31, 2011. Shareholders' equity at June 30, 2012, was $25,196,000 or $5.47 per outstanding share. This compares to shareholders' equity at December 31, 2011, of $25,171,000 or $5.46 per outstanding share. Craig?