5. Inventories, net
Inventories consist of the following (in thousands):
| | | | | | | |
| | August 1, | | April 30, | |
| | 2020 | | 2020 | |
Raw materials | | $ | 15,136 | | $ | 15,988 | |
Work in process | | | 12,958 | | | 10,340 | |
Finished goods | | | 26,640 | | | 29,439 | |
Inventories, gross | | | 54,734 | | | 55,767 | |
Reserve for inventory excess and obsolescence | | | (9,204) | | | (10,232) | |
Inventories, net | | $ | 45,530 | | $ | 45,535 | |
6. Equity Method Investments
In December of 2017, the Company and SoftBank formed a joint venture, HAPSMobile, which is a Japanese corporation. As of August 1, 2020, the Company’s ownership stake in HAPSMobile was approximately 7%, with the remaining 93% held by SoftBank. In connection with the formation of the joint venture on December 27, 2017, the Company initially purchased shares of HAPSMobile representing a 5% ownership interest in exchange for an investment of 210,000,000 yen ($1,860,000). The Company subsequently purchased additional shares of HAPSMobile in order to maintain a 5% ownership stake in the joint venture. The first such purchase occurred on April 17, 2018, at which time the Company invested 150,000,000 yen ($1,407,000) for the purchase of additional shares of HAPSMobile. On January 29, 2019, the Company invested an additional 209,500,000 yen ($1,926,000) to maintain its 5% ownership stake. On February 9, 2019, the Company elected to purchase 632,800,000 yen ($5,671,000) of additional shares of HAPSMobile to increase the Company’s ownership in the joint venture from 5% to 10%, and on May 10, 2019, the Company purchased 500,000,000 yen ($4,569,000) of additional shares of HAPSMobile to maintain its 10% ownership stake. The Company’s ownership percentage was subsequently diluted from 10% to approximately 5%. On December 4, 2019, the Company purchased 540,050,000 yen ($4,982,000) of additional shares of HAPSMobile to increase its ownership stake to approximately 7%.
As the Company has the ability to exercise significant influence over the operating and financial policies of HAPSMobile pursuant to the applicable Joint Venture Agreement and related organizational documents, the Company’s investment is accounted for as an equity method investment. For the three months ended August 1, 2020 and July 27, 2019, the Company recorded its ownership percentage of the net loss of HAPSMobile, or $1,008,000 and $1,347,000, respectively, in equity method investment loss, net of tax in the unaudited consolidated statement of income. At August 1, 2020 and April 30, 2020, the carrying value of the investment in HAPSMobile of $9,522,000 and $10,455,000, respectively, was recorded in other assets.
Investment in Limited Partnership Fund
In July 2019, the Company made its initial capital contribution to a limited partnership fund focusing on highly relevant technologies and start-up companies serving defense and industrial markets. On July 15, 2020, the Company made an additional contribution of $1,173,000. Under the terms of the limited partnership agreement, the Company has committed to make additional capital contributions of $3,880,000 to the fund. The Company accounts for investments in limited partnerships as equity method investments as the Company is deemed to have influence when it holds more than a minor interest. For the three months ended August 1, 2020, the Company recorded its ownership percentage of the net loss of the limited partnership, or $280,000, in equity method investment loss in the consolidated statements of income. For the three months ended July 27, 2019, the Company recorded 0 net loss of the limited partnership. At August 1, 2020 and April 30, 2020, the carrying value of the investment in the limited partnership of $5,334,000 and $4,442,000, respectively, was recorded in long-term investments.
7. Warranty Reserves
The Company accrues an estimate of its exposure to warranty claims based upon both current and historical product sales data and warranty costs incurred. The warranty reserve is included in other current liabilities. The related expense is