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At December 31, 2020 and 2019, the fair values of cash, accounts receivable and accounts payable approximated their carrying values because of the short-term nature of these instruments. (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Reported Value Measurement [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Line of credit and long-term debt | $ 33,445,446 | $ 30,987,918
Estimate of Fair Value Measurement [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Line of credit and long-term debt | $ 33,445,446 | $ 30,987,918

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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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Data Type: | na
Balance Type: |
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