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REVOLVING LOAN, SHORT TERM NOTE AND LONG-TERM DEBT (Tables) | 9 Months Ended
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Sep. 30, 2022
Debt Disclosure [Abstract] |
Summary of debt | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30, |  | December 31,
​ | ​ | 2022 | ​ | 2021
PPP Promissory Note - In April 2020, the Company applied for and received $773,810 in SBA loans through the paycheck protection program. During the period ended March 31, 2022, the Company made $90,198 in principal payments and during the year ended December 31, 2021 the SBA forgave $392,200 of the PPP loan. In April 2022, the SBA forgave the remaining balance of $126,131 and issued a refund for $48,305 of principal payments made during the three months ended March 31, 2022. | ​ | $ | — | ​ | $ | 216,329
2021 Revolving Loan - On June 17, 2021, the Company amended its revolving loan agreement (“amended revolver”) and increased the maximum balance to $9,000,000. The amended revolver matures on December 31, 2023 and has an annual interest rate equal to the prime rate less 0.25%. The revolver is secured by the certificate of deposit accounts held with the financial institution, and reported as restricted cash, in the amount of $5,257,382 and $5,240,752 as of September 30, 2022 and December 31, 2021, respectively. Debt covenants of this loan require the Company to maintain a minimum debt service coverage ratio of at least 1.5 to 1. | ​ |  | 9,000,000 | ​ |  | 9,000,000
2021 Promissory Note - On June 17, 2021, the Company amended its loan agreement to reduce the principal amount with financial institution for 10 years, annual interest rate of 3.5% for the first 5 years, and then floating at Wall Street Journal rate from years 6 to 10, the loan is secured by the Company’s building and matures on June 30, 2031. The note is subject to a prepayment penalty. | ​ |  | 2,904,815 | ​ |  | 2,962,782
2022 Short Term Note - On January 26, 2022, the Company amended its revolving loan and long-term debt agreements to obtain an additional note with a principal balance of $10,000,000 which matures on January 26, 2023. Interest shall be equal to the higher of 3.75% or the Wall Street Journal Prime Rate plus 0.50%. The loan is secured by the Company’s assets. In the event of a default, all outstanding amounts under the note will bear interest at a default rate equal to 5% over the note rate. Debt covenants of this loan require the Company to maintain a minimum debt service coverage ratio of at least 1.5 to 1 and will be measured quarterly. In November 2022, the maturity was extended to January 26, 2024; see Note 19 - Subsequent Events. | ​ |  | 6,666,667 | ​ |  | —
Total | ​ |  | 18,571,482 | ​ |  | 12,179,111
Less: current portion | ​ |  | 15,746,092 | ​ |  | 9,293,677
Total long-term debt | ​ | $ | 2,825,390 | ​ | $ | 2,885,434
Summary of future minimum payments of its long-term debt | ​
​ | ​ | ​ | ​
Years ending December 31, |  | Amount
Remainder of 2022 | ​ | $ | 1,269,381
2023 | ​ |  | 14,496,804
2024 | ​ |  | 82,748
2025 | ​ |  | 86,013
2026 | ​ |  | 89,115
Thereafter | ​ |  | 2,547,421
​ | ​ | $ | 18,571,482

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of maturity and sinking fund requirement for long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=123465755&loc=d3e1835-112601 + Details
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