Amortized cost, net unrealized gains or losses, and fair values (Details) |
12 Months Ended |
|---|---|
|
Apr. 30, 2022
USD ($)
| |
| Available For Sale Securities Amortized Cost [Member] | |
| Money market funds | $ 799,047 |
| Asset-backed securities | 2,894,512 |
| Corporate bonds | 42,571,104 |
| Total | 46,264,663 |
| Available For Sale Securities Fair Value [Member] | |
| Money market funds | 799,936 |
| Asset-backed securities | 2,861,559 |
| Corporate bonds | 41,128,874 |
| Total | 44,790,369 |
| Available For Sale Securities Unrealized Gain Loss [Member] | |
| Debt Securities, Available-for-Sale, Unrealized Gain (Loss) | 889 |
| Asset Backed Securities Net Unrealized Gain Losses [Member] | |
| Debt Securities, Available-for-Sale, Unrealized Gain (Loss) | (32,953) |
| Corporate Bonds Unrealized Gain Losses [Member] | |
| Debt Securities, Available-for-Sale, Unrealized Gain (Loss) | (1,442,230) |
| Available For Sale Securities Net Unrealized Gain Losses [Member] | |
| Debt Securities, Available-for-Sale, Unrealized Gain (Loss) | $ (1,474,294) |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Investments in notes or bonds that are collateralized by a specific group of underlying assets owned by the issuer of the notes or bonds which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. No definition available.
|
| X | ||||||||||
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. No definition available.
|
| X | ||||||||||
- Definition Amount of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). No definition available.
|
| X | ||||||||||
- Definition Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|