Schedule II: Valuation and Qualifying Accounts (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
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| SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] | ||
| Balance at beginning of year | $ 1,000,987 | $ 535,254 |
| Additions to charged to expenses/other accounts | 689,824 | 465,733 |
| Balance at end of year | $ 1,690,811 | $ 1,000,987 |
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- References No definition available.
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- Definition Amount of valuation and qualifying accounts and reserves. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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