Note 7 - Inventories	6 Months Ended
Oct. 31, 2021
Notes to Financial Statements
Inventory Disclosure [Text Block]	7. Inventories: Inventories are determined on a first-in, first-out basis, valued at net realizable value. Inventories include material, labor and factory overhead required in the production of our products. Inventory obsolescence is examined on a regular basis. When determining our estimate of obsolescence, we consider inventory that has been inactive for five years or longer and the probability of using that inventory in future production. The obsolete inventory generally consists of Falcon and Learjet parts and electrical components. At October 31, 2021 and April 30, 2021, the estimate of obsolete inventory was $691 and $691 respectively.

Note 7 - Inventories

6 Months Ended

Oct. 31, 2021

7. Inventories: Inventories are determined on a first-in, first-out basis, valued at net realizable value. Inventories include material, labor and factory overhead required in the production of our products.

Inventory obsolescence is examined on a regular basis. When determining our estimate of obsolescence, we consider inventory that has been inactive for five years or longer and the probability of using that inventory in future production. The obsolete inventory generally consists of Falcon and Learjet parts and electrical components. At October 31, 2021 and April 30, 2021, the estimate of obsolete inventory was $691 and $691 respectively.