Note 7 - Debt	6 Months Ended
Oct. 31, 2020
Notes to Financial Statements
Debt Disclosure [Text Block]	7. Debt: At October 31, 2020 , the Company was utilizing a promissory note in the form of a line of credit totaling $5,000. The unused line at October 31, 2020 was $5,000 . The interest rate on this promissory note is 3.65%. The line of credit is due on demand and is collateralized by the first and second positions on all assets of the Company. At October 31, 2020 , there was one note with an interest rate of 6.25% collateralized by aircraft security agreements totaling $1,427 . This note was used for the purchase and modifications of collateralized aircraft. This note matures in January 2023. At October 31, 2020 , there is one note totaling $212 collateralized by real estate in Dodge City, Kansas. The interest rate on this note is 6.25% . This note matures in June 2024. At October 31, 2020 , there is one note collateralized by equipment with a balance of $32 . The interest rate on this note is 4.5% . This note matures in April 2022. At October 31, 2020 , there is a note payable collateralized by real estate with a balance of $1,347 . The interest rate on this note is at LIBOR plus 1.75% . This note matures in March 2029. At October 31, 2020 , there is a note payable collateralized by real estate with a balance of $617 . The interest rate on this note is at LIBOR plus 1.75% . This note matures in March 2029. In May 2020, the Company received a Paycheck Protection Program (PPP) loan for $2,001. Funds from the loan may only be used for payroll costs, costs to continue group health care benefits, rent and utilities. The loan and accrued interest are forgivable as long as the borrower uses the proceeds for eligible purposes. The unforgiven portion of the PPP loan is payable over two years at an interest rate of 1%, with a deferral of payments for the first six months. The Company used the entire loan amount for qualifying expenses. The Company has applied for forgiveness of this loan and is awaiting determination. While the Company currently believes that its use of the loan proceeds will meet the conditions for forgiveness of the loan, we cannot assure if and when a portion or all of the loan will be forgiven. We are not in default of any of our notes as of October 31, 2020 . We believe that our current banks will provide the necessary capital for our business operations. However, we continue to maintain contact with other banks that have an interest in funding our working capital needs to continue our growth in operations in 2021 and beyond.

Debt: At

October 31, 2020

, the Company was utilizing a promissory note in the form of a line of credit totaling

$5,000.

The unused line at

October 31, 2020

was

$5,000

. The interest rate on this promissory note is

3.65%.

The line of credit is due on demand and is collateralized by the

first

and

second

positions on all assets of the Company.

October 31, 2020

, there was

one

note with an interest rate of

6.25%

collateralized by aircraft security agreements totaling

$1,427

. This note was used for the purchase and modifications of collateralized aircraft. This note matures in

January 2023.

October 31, 2020

, there is

one

note totaling

$212

collateralized by real estate in Dodge City, Kansas. The interest rate on this note is

6.25%

. This note matures in

June 2024.

October 31, 2020

, there is

one

note collateralized by equipment with a balance of

$32

. The interest rate on this note is

4.5%

. This note matures in

April 2022.

October 31, 2020

, there is a note payable collateralized by real estate with a balance of

$1,347

. The interest rate on this note is at LIBOR plus

1.75%

. This note matures in

March 2029.

October 31, 2020

, there is a note payable collateralized by real estate with a balance of

$617

. The interest rate on this note is at LIBOR plus

1.75%

. This note matures in

March 2029.

May 2020,

the Company received a Paycheck Protection Program (PPP) loan for

$2,001.

Funds from the loan

may

only be used for payroll costs, costs to continue group health care benefits, rent and utilities. The loan and accrued interest are forgivable as long as the borrower uses the proceeds for eligible purposes. The unforgiven portion of the PPP loan is payable over

two

years at an interest rate of

1%,

with a deferral of payments for the

first

six

months. The Company used the entire loan amount for qualifying expenses. The Company has applied for forgiveness of this loan and is awaiting determination. While the Company currently believes that its use of the loan proceeds will meet the conditions for forgiveness of the loan, we cannot assure if and when a portion or all of the loan will be forgiven.

We are

not

in default of any of our notes as of

October 31, 2020

We believe that our current banks will provide the necessary capital for our business operations. However, we continue to maintain contact with other banks that have an interest in funding our working capital needs to continue our growth in operations in

2021

and beyond.