Station operating expense was $64,649,0000 for the nine months ended September 30, 2022, compared with $61,630,000 for the nine months ended September 30, 2021, an increase of $3,019,000 or 4.9%. The increase in operating expense was primarily the result of increases in sales survey expenses, commission expenses, compensation related expenses, barter expenses, bad debt expenses, and music licensing fees of $1,111,000, $617,000, $449,000, $312,000, $297,000 and $219,000, respectively, for the comparable period of 2021.
We had operating income for the nine months ended September 30, 2022 of $8,146,000 compared to $10,117,000 for the nine months ended September 30, 2021, a decrease of $1,971,000. The decrease was a result of the increase in net operating revenue, partially offset by an increase in station operating expense, as noted above, offset by an increase in corporate general and administrative expenses of $4,500,000 and an increase in other operating (income) expense of $28,000. The increase in corporate general and administrative expenses was primarily attributable to expenses under the employment agreement we had with our founder and CEO, Mr. Christian upon his death of which $3.9 million was recorded in the third quarter. In addition, we had an increase in other compensation-related expenses (besides those related to our founder), legal expenses, transportation related costs and FCC-related fees of $290,000, $167,000, $115,000, and $77,000, respectively, from 2021. For our other operating (income) expense, net in 2022 we recorded a loss on the sale of fixed assets of $3,000 compared to a gain on the sale of fixed assets of $25,000 in 2021.
We generated net income of $4,923,000 ($0.82 per share on a fully diluted basis) during the nine months ended September 30, 2022, compared to $7,465,000 ($1.25 per share on a fully diluted basis) for the nine months ended September 30, 2021, a decrease of $2,542,000. The decrease in net income is primarily due to the decrease in operating income, described above, an increase in interest income of $173,000 and an increase in income tax expense of $320,000, partially offset by a decrease in interest expense of $122,000, and a decrease in other income of $546,000. The increase in interest income is related to our short-term investments described in footnote 1 (Summary of Significant Accounting Policies). The increase in our income tax expense is due to the permanent difference between book and taxable income related to the compensation paid to our founder and CEO as described above and in footnote 8 (Income Taxes). The decrease in interest expense is due to no longer having any debt outstanding, after paying off the remaining balance in the fourth quarter of 2021. The decrease in other income is due to the insurance gains received in 2021 versus. the minimal other income earned in 2022.
Liquidity and Capital Resources
Debt Arrangements and Debt Service Requirements
On August 18, 2015, we entered into a credit facility (the “Credit Facility”) with JPMorgan Chase Bank, N.A., The Huntington National Bank, Citizens Bank, National Association and J.P. Morgan Securities LLC (collectively, the “Lenders”) pursuant to a credit agreement of even date (the “Credit Agreement”). The Credit Facility consisted of a $100 million five-year revolving facility (the “Revolving Credit Facility”) and originally matured on August 18, 2020. On June 27, 2018, the Company entered into a Second Amendment to its Credit Facility, (the “Second Amendment”), which had first been amended on September 1, 2017, extending the revolving credit maturity date under the Credit Agreement for five years after the date of the amendment to June 27, 2023. On July 1, 2019, we elected to reduce our Revolving Credit Facility to $70 million. On May 11, 2020, as part of our reincorporation as a Florida corporation, we entered into an assumption agreement and amendment of loan documents. This amendment also included an alternative benchmark rate as a replacement to LIBOR in the event LIBOR is no longer available. On November 2, 2021, we elected to further reduce our Revolving Credit Facility to $50 million. We are currently working on extending our credit agreement with similar terms and conditions as the existing facility.We have pledged substantially all of our assets (excluding our FCC licenses and certain other assets) in support of the Credit Facility and each of our subsidiaries has guaranteed the Credit Facility and has pledged substantially all of their assets (excluding their FCC licenses and certain other assets) in support of the Credit Facility.
Approximately $266,000 of debt issuance costs related to the Credit Facility were capitalized and are being amortized over the life of the Credit Facility. These debt issuance costs are included in other assets, net in the consolidated balance sheets. As a result of the Second Amendment, the Company incurred an additional $120,000 of transaction fees related to the Credit Facility that were capitalized. The cumulative transaction fees are being amortized over the remaining life of the Credit Facility.