Liquidity and Capital Resources as of July 31, 2020
At July 31 and January 31, 2020, our balances of cash and cash equivalents were $382.4 million and $167.4 million, respectively. During this same period, our working capital decreased by $7.7 million to $270.0 million as of July 31, 2020 from $277.7 million as of January 31, 2020.
The net amount of cash provided by operating activities for the six months ended July 31, 2020 was $102.9 million. Our net income for the six months ended July 31, 2020, adjusted favorably by the net amount of non-cash income and expense items, represented a source of cash in the total amount of $18.3 million. However, the sources of cash from operations for the current year period included primarily a temporary increase in the balance of contract liabilities associated with the early phases of the Guernsey Power Station construction and new project awards at TRC in the amount of $83.3 million. Reductions in the balances of accounts receivable and contract assets, primarily at the TRC and APC operations, provided cash in the amounts of $7.5 million and $6.9 million, respectively. In addition, the combined level of accounts payable and accrued expenses increased by $4.7 million during the six months ended July 31, 2020, a source of cash for the period.
As discussed above, our income tax accounting for the six months ended July 31, 2020 reflects an entry to record the carryback of our net operating loss incurred for the year ended January 31, 2020 to our tax year ended January 31, 2015. The loss carryback should result in a refund of federal income taxes in the amount of $12.6 million. This tax refund receivable has been included in the balance of other current assets as of July 31, 2020, which was the primary cause of the increase in this balance of $17.8 million during the period, a use of cash.
Another primary source of cash for the six months ended July 31, 2020 was the net maturities of short-term investments, certificates of deposit issued by the Bank, in the amount of $135.0 million. Non-operating activities used cash during the six months ended July 31, 2020, including the payment of regular and special cash dividends in the total amount of $23.5 million. During the six-month period ended July 31, 2020, capital expenditures were reduced by approximately 62.8% to $1.1 million from a capital expenditures amount of $3.0 million for the six months ended July 31, 2019. Partially offsetting these uses of cash, we received cash proceeds related to the exercise of stock options during the six months ended July 31, 2020 in the amount of $0.7 million. As of July 31, 2020, there were no restrictions with respect to inter-company payments from GPS, TRC, APC or SMC to the holding company. However, during the prior year, certain loans made by Argan to APC were determined to be uncollectible.
Last year, the net amount of cash used by operating activities for the six months ended July 31, 2019 was $53.2 million. Our net loss for the period, offset partially by the favorable adjustments related to non-cash income and expense items, used cash in the total amount of $29.6 million. Due substantially to the increased activity at TRC last year, accounts receivable increased during the six months ended July 31, 2019, representing a use of cash in the amount of $9.8 million. The Company also used cash during the six months ended July 31, 2019 in the amount of $16.4 million to reduce the level of accounts payable and accrued expenses. The net balance of contract assets and liabilities did not change materially during the six-month period ended July 31, 2019. Due primarily to the receipt of refunds of excess estimated income tax payment amounts, the balance of other assets decreased by $2.7 million during the six months ended July 31, 2019, a source of cash.
The primary source of cash required to fund operations during the six months ended July 31, 2019 was the net maturity of short-term investments in the amount of $69.0 million. Cash proceeds in the amount of $1.6 million were received from the exercise of stock options during the six-month period ended July 31, 2019. Non-operating activities used cash during the six months ended July 31, 2019, including primarily the payment of a quarterly cash dividends in the total amount of $7.8 million. As indicated above, our operating subsidiaries used cash during the six-month period ended July 31, 2019 in the amount of $3.0 million to fund capital expenditures.
At July 31, 2020, most of our balance of cash and cash equivalents was invested in a money market fund with most of its total assets invested in cash, US Treasury obligations and repurchase agreements secured by US Treasury obligations. The major portion our domestic operating bank account balances are maintained with the Bank. We do maintain certain Euro-based bank accounts in Ireland and certain pound sterling-based bank accounts in the UK in support of the operations of APC.