Accounts Receivable and Significant Concentrations (Tables)

9 Months Ended

Sep. 30, 2021

Accounts Receivable and Significant Concentrations

Schedule of accounts receivable

	SEPTEMBER 30,		DECEMBER 31,
	2021		2020
	(Unaudited)
Government (1)	$	9,025,163	$	34,097,906
Commercial (2)		1,208,536		1,898,924
Gross accounts receivable		10,233,699		35,996,830
Less: allowances for doubtful accounts (3)		84,971		114,169
Accounts receivable, net	$	10,148,728	$	35,882,661

Schedules of concentration of risk

	THREE MONTHS ENDED				NINE MONTHS ENDED
	SEPTEMBER 30,				SEPTEMBER 30,
Customer Type	2021		2020		2021		2020
	(Unaudited)
U.S. Federal Government (1)		87.1%		94.0%		84.2%		91.4%
U.S. State & Local and Foreign Governments		0.3%		0.1%		0.4%		0.1%
Commercial		12.6%		5.9%		15.4%		8.5%