Thank you, Jim. First, I'll talk about the 3 months ended December 31, which is our fiscal second quarter. Revenue for the second quarter totaled $2.67 million compared to $2.53 million for the second quarter of last year, which is an increase of 6%. The increase from last year was primarily attributable to a 30% increase in sales volume of precision molded optics lenses, which account for 78% of our revenue. Despite the increase in the sales of precision molded optic lenses during the period, our average per unit selling price was lower due to a higher percentage of our sales being shipped against longer-term negotiated contracts, which have slightly lower prices.
Our gross margin percentage in the second quarter compared to last year decreased to 32% from 40%. Total manufacturing cost of $1.83 million was approximately $300,000 higher in the second quarter compared to last year. This increase in total manufacturing cost was due primarily to a change in the mix of the products sold as compared to the same period last year. Also, a one-time severance cost incurred with respect to Orlando and Shanghai employees and a charge for the return of products by a customer resulting from customer spec changes.
Unit shipment volumes in precision molded optics was up 30% in the second quarter compared to last year, but our average selling prices were lower in the second quarter of fiscal 2012. 46% of our precision molded optics sales in units were of the more expensive glass type compared to 15% in the same period last year. Direct costs, which include material, labor and services, decreased to 26% of revenue in the second quarter as compared to 28% of revenue in the second quarter last year. The decrease in direct costs was primarily due to lower lens coating costs and improved labor productivity.
We experienced an increase in labor costs at our Shanghai facility due to increases in the minimum wage and higher benefit costs and increases in employee headcount during portions of last year and this year. Headcount in Shanghai was reduced during the second quarter to reflect our improved productivity and yield and to better match our production requirements to our current 12-month backlog.
During the second quarter, total operating costs and expenses decreased by approximately $90,000 to $1.16 million compared to $1.25 million for the same period last year. Selling, general and administrative or SG&A expenses decreased by approximately $113,000 to $884,000 in the second quarter compared to last year. This decrease was primarily due to a $75,000 decrease in investor relations expenses and a $33,000 decrease in legal expenses. We intend to maintain SG&A costs generally at current levels with some increases expected for sales and marketing. The net result of the higher cost of goods sold and the lower total operating costs and expenses is a net operating loss of approximately $320,000 for the second quarter.
Interest expense was approximately $23,000 in the second quarter as compared to $113,000 for last year. This higher interest expense last year resulted from the accelerated conversion by certain investors as they debentured into common stock, which reduced the company's debt obligation by $100,000. The accelerated conversion resulted in approximately $56,000 of costs associated with the principal amount converted to the expense during the second quarter of last year due to the interest and debt issuance costs being amortized over the full life of the debentures. The debentures, which were issued August 1, 2008, accounted for approximately all the interest, which accrues at 8% per annum during the second quarter of this year and last year.
Net loss for the second quarter was approximately $343,000 or $0.04 per basic and diluted common share compared to approximately $374,000 or $0.04 per basic and diluted common share for last year. Weighted average basic shares outstanding increased to 9.8 million compared to 9.7 million last year, primarily due to the conversion of the debentures last year.
Now I'd like to talk about the 6 months or our first half, which also ended December 31. Revenue for the first half totaled approximately $5.41 million compared to approximately $4.78 million for the first half of last year. This is an increase of 13%. The increase from last year was primarily attributable to higher sales volumes in precision molded optics, which accounted for 78% of our revenue, and higher sales of collimators. Although unit volumes of precision molded optics were 50% higher than last year, our average selling price was 20% lower. This is due to the product volume/mix change we experienced as high-volume precision molded optics products became a larger percentage of our overall sales. Growth in sales going forward is expected to be derived primarily from the precision molded optics product line, particularly our low-cost lenses being sold in Asia, our infrared lenses and our collimators.
Our gross margin percentage in the first half compared to last year decreased to 36% from 38%. Total manufacturing cost of approximately $3.48 million was approximately $523,000 higher in the first half compared to last year. The decrease in gross margin was due primarily to a change in the mix of the products sold as compared to last year, not achieving projected revenues and as well as increased costs.
We sold 50% more precision molded optics lenses units as compared to last year, the first half of last year, but our average selling price was 20% lower. The decrease in our average selling price per unit is due to a higher percentage of our sales being shipped against longer-term negotiated contracts, which have slightly lower prices. In the first half, 50% of sales of our precision molded optics lenses were produced with the more expensive glass types compared to 15% of sales last year. This increase was due to a mix change with fewer low-cost precision molded optics lenses than forecasted.
Our industrial tool lens volume grew but was under forecast as construction in China remained weak, impacted by the continued tight monetary policy of the Chinese government. Management is committed to continuing efforts to transition more precision molded optics lenses to less expensive glass, which will contribute towards achieving profitability, assuming we meet our sales targets and goals for producing and selling more low-cost lenses at higher volumes.
We also experienced an increase in labor costs and some one-time costs for severance incurred with respect to Orlando and Shanghai employees, an unusual charge for the return of products by a customer resulting from customer specification changes. We experienced an increase in labor costs at our Shanghai facility due to increases in the minimum wage and also higher benefit costs and an increase in employee headcount during portions of both this year and last year. Headcount in Shanghai was reduced during the first of this year to reflect the improved productivity and yield and to better match our production requirements to our current 12-month backlog.
Overtime expense paid to employees at our Orlando and Shanghai facilities also improved during the first half. This increase in overtime expense was primarily due to certain production equipment being taken offline for repairs during a time when we were implementing a planned machine conversion. This led to a temporary decrease in tooling capacity and required that our employees work extra shifts in order to meet the demand for our products. Both the machine repairs to our Computerized Numerical Control or CNC equipment and the machine conversion are complete, which we anticipate will reduce the likelihood of incurring significant overtime expense in the future.
Direct costs, which include material, labor and services, decreased to 27% of revenue in the first half as compared to 28% for last year, primarily due to productivity and yield improvements. During the first half, total operating costs and expenses decreased by approximately $100,000 to $2.46 million compared to $2.56 million for last year. SG&A expenses decreased by approximately $189,000 to $1.88 million in the first half of last -- compared to the first half of last year. This decrease was due to a $130,000 decrease in investor relations expenses, a $46,000 decrease in fees paid to NASDAQ and a $12,000 decrease in expenses for press releases. We intend to maintain SG&A costs generally at current levels with some increases expected for sales and marketing. The net result of the higher cost of goods sold and lower total operating cost and expenses is a net operating loss of approximately $529,000 for the first half.
Interest expense was approximately $47,000 in the first half compared to $494,000 for last year. The higher expense last year resulted from the accelerated conversion by certain investors of their debentures into common stock, which reduced the company's debt obligation by $832,500. These accelerated conversions resulted in approximately $256,000 of debt cost associated with the principal amount converted to the expense during the first half of last year due to interest and debt issuance costs being amortized over the full life of the debentures. The debentures issued in August 1, 2008, accounted for approximately all of the interest which as we reported, which accrues at 8% per annum during both the first half of this year and last year.
Net loss for the first half was approximately $542,000 or $0.06 per basic and diluted common share compared to $1.23 million or $0.13 per basic and diluted share for the same period last year. Weighted average basic shares outstanding increased to 9.8 million compared to 9.4 million last year, the difference primarily due to the shares which converted -- the conversion of the debentures.
I would now like to talk about key areas on the balance sheet. Cash and cash equivalents totaled approximately $595,000 at December 31. Total current assets and total assets were $4.61 million and $7.09 million compared to $4.61 million and $7.12 million last year -- I'm sorry, June 30, our fiscal year end. Total current liabilities and total liabilities at December 31 were $1.85 million and $3.34 million compared to $1.53 million and $3.09 million for June 30, 2011. As a result, the current ratio as of December decreased to $2.49 million -- to 2.49:1 compared to 3.01:1 at June 30. Total stockholder's equity at December 31 totaled $3.75 million compared to $4.04 million at June 30. As of December 31, 2011, our backlog of orders scheduled to ship in the next 12 months was $3.83 million, which compared to $3.87 million at June 30, 2011.
I would now like to turn the call back over to Jim for some closing comments.