Accounts Receivable and Significant Concentrations (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Accounts receivable, gross	$ 19,325,270	$ 35,996,830
Less: allowances for doubtful accounts
Accounts receivable, net	19,214,216	35,882,661
Government
Accounts receivable, gross	17,748,775	34,097,906
Commercial
Accounts receivable, gross	$ 1,576,495	$ 1,898,924

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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