Consolidated Statements of Cash Flows (Parenthetical) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of cash and cash equivalents and restricted cash per consolidated balance sheets to statements of cash flows
Cash and cash equivalents	$ 6,447,402	$ 6,451,758
Restricted cash		750,000
Total cash, cash equivalents and restricted cash per statements of cash flows	$ 6,447,402	$ 7,201,758	$ 2,172,985

Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, 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.

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