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Inventories, net | 12 Months Ended
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Apr. 30, 2021
Inventories, net |
Inventories, net | 5. Inventories, net ​ Inventories consist of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | April 30, | ​
​ |  | 2021 |  | 2020 |
Raw materials | ​ | $ | 23,997 | ​ | $ | 15,988 | ​
Work in process | ​ |  | 13,825 | ​ |  | 10,340 | ​
Finished goods | ​ |  | 44,113 | ​ |  | 29,439 | ​
Inventories, gross | ​ |  | 81,935 | ​ |  | 55,767 | ​
Reserve for inventory excess and obsolescence | ​ |  | (10,289) | ​ |  | (10,232) | ​
Inventories, net | ​ | $ | 71,646 | ​ | $ | 45,535 | ​
​ For the fiscal years ended April 30, 2021, 2020 and 2019, the Company recorded inventory reserve charges of $1,178,000, $5,377,000 and $5,054,000, respectively. Of the $5,377,000 inventory reserve recorded during fiscal year ended April 30, 2020, approximately $2,600,000 related to an impairment of the remaining net book value of the Company’s Quantix commercial UAS solution.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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