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Notes Payable - Additional Information (Detail) - USD ($) |  |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 11, 2018 | Aug. 20, 2016 | May 31, 2022 | May 31, 2021 | May 31, 2022 | May 31, 2021 | Jun. 30, 2020 | Aug. 26, 2016 | Jul. 01, 2016
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, amount advanced |  |  |  |  |  |  | $ 350,000 |  |
Interest expense |  |  | $ 276,524 | $ 341,390 | $ 582,619 | $ 621,609 |  |  |
Debt issuance costs |  |  | 548,085 |  | 548,085 |  |  |  |
Amortization of debt issuance costs |  |  | 3,388 | 15,390 | 9,777 | 35,072 |  |  |
Texas Capital Bank National Association [Member] | Amended And Restated Promissory Notes [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest expense |  |  | $ 5,969 | $ 32,894 | $ 18,115 | $ 73,432 |  |  |
Texas Capital Bank National Association [Member] | Amended And Restated Promissory Notes [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Second amended and restated promissory note principal amount | $ 15,500,000 |  |  |  |  |  |  |  |
Senior Credit Facilities [Member] | Texas Capital Bank National Association [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, description |  |  |  |  | Subject to the terms of the Credit Agreement, on August 20, 2016, TCB advanced the Company $100.00. On July 1, 2016, TCB advanced the remaining principal amount of $7,999,900 per a promissory note dated August 20, 2016 between the Company and TCB, at a rate of 3.75% per annum plus LIBOR, payable monthly with a maturity date of July 2021 which was extended to June 2022 pursuant to the Second Amendment to Credit Agreement discussed below. |  |  |  |
Line of credit facility, frequency of payment |  |  |  |  | monthly |  |  |  |
Line of credit facility, interest rate description |  |  |  |  | 3.75% per annum |  |  |  |
Senior Credit Facilities [Member] | Texas Capital Bank National Association [Member] | Promissory Notes [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, amount advanced |  |  |  |  |  |  |  |  | $ 7,999,900
Senior Credit Facilities [Member] | London Interbank Offered Rate (LIBOR) [Member] | Texas Capital Bank National Association [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Term loan, maximum borrowing capacity |  | $ 8,000,000.0 |  |  |  |  |  |  |
Line of credit facility, amount advanced |  | $ 100.00 |  |  |  |  |  |  |
Line of credit facility, interest rate |  | 3.75% |  |  |  |  |  |  |
Line of credit facility, expiration date | Jun. 30, 2022 | Jul. 31, 2021 |  |  |  |  |  |  |
Amended Senior Credit Facility [Member] | Texas Capital Bank National Association [Member] | Amended And Restated Promissory Notes [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, amount advanced |  |  |  |  |  |  |  | $ 2,133,433 |
Second Amended Senior Credit Facility [Member] | Texas Capital Bank National Association [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, amount advanced | $ 9,000,000 |  |  |  |  |  |  |  |

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