was due to internal growth, augmented by $4.3 million of incremental revenue from two months of revenue from the acquisitions of HistoTox Labs and Bolder BioPATH in Q3 FY 2021.
Cost of Service revenue as a percentage of Service revenue decreased to 67.2% in 9M FY 2021, from 69.0% in the prior year period. The reduction in Cost of Service revenue as a percentage of Service revenue is due primarily to improved operating leverage and the greater utilization of recently expanded capacity.
Product segment revenue increased 6.4% to $2.7 million in 9M FY 2021, from $2.5 million in the prior year period, reflecting higher sales of analytical instruments, partially offset by a decrease in Culex in-vivo sampling systems and other instruments.
Cost of Product revenue as a percentage of Product revenue in 9M FY 2021 decreased to 55.3%, from 68.9% in the prior year period, due to expense reductions implemented in the last half of FY 2020 and improved margins on existing sales.
Operating expenses in 9M FY 2021 increased year over year by 42.0%, or $6.5 million, as the Company continued to build the infrastructure for anticipated growth, which included additional headcount, recruiting, relocation expense, sales commissions, non-cash stock compensation expense, costs associated with acquisitions and investments in business development to build out new service offerings. For the 9M FY 2021, we began investing in additional service offerings such as software solutions and human resources to support existing internal expertise in the area of SEND (Standard for the Exchange of Nonclinical Data) data management and delivery investments in SEND reporting, safety pharmacology, clinical pathology, medical device pathology, biotherapeutics and genetic toxicology.
Net loss for 9M FY 2021 totaled $3.4 million, or $(0.27) per diluted share, compared to a net loss of $2.9 million, or $(0.27) per diluted share, in the prior year period.
Adjusted EBITDA increased to $5.0 million for 9M FY 2021, compared to $2.6 million for 9M FY 2020.
Cash Provided by Operating Activities and Financial Condition
As of June 30, 2021, the Company had $24.7 million in cash and cash equivalents, a $0 balance and $5.0 million of availability on its general line of credit, and a $0.9 million balance on a $3.0 million equipment loan that is available until April 30, 2022.
In April 2021, the Company completed a public offering of 3,044,117 common shares. The net proceeds after deducting the underwriting discount and offering expenses payable by the Company were approximately $49.0 million. A portion of the proceeds was used in April 2021 to close the acquisitions of HistoTox Labs and Bolder BioPATH.
Cash provided by operating activities was $8.0 million for 9M FY 2021, compared to $1.6 million in 9M FY 2020. For the nine months ended June 30, 2021, cash from operations, cash on hand, $1.3 million from an equipment line of credit and borrowings on a term loan of $2.1 million together funded capital expenditures of $8.4 million for the investment in laboratory equipment to increase capacity at all locations, facility improvements at the Fort Collins location and the purchase of our St. Louis facility.
Conference Call
Management will host a conference call on Wednesday, August 11, 2021, at 4:30 pm ET to discuss third quarter reported results for fiscal year 2021.