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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net (loss) income	$ (1,505,550)	$ 1,658,478
Adjustments to reconcile net (loss) income to net cash (used in) operating activities
Stock-based compensation	50,373	72,648
Depreciation and amortization	255,644	327,540
(Increase)/decrease in operating assets
Accounts receivable	228,699	(692,719)
Contract assets	(533,007)	(1,240,143)
Inventories	(216,160)	19,146
Tax receivable		(1,528,305)
Other current assets	251,987	200,980
Increase/(decrease) in operating liabilities
Accounts payable	(314,625)	201,587
Accrued expenses	264,123	(422,268)
Contract liabilities	(53,150)	727,818
Total adjustments	(66,116)	(2,333,716)
Net cash used in operating activities	(1,571,666)	(675,238)
Cash flows from investing activities:
Capital expenditures	(26,744)	(422,435)
Net cash used in investing activities	(26,744)	(422,435)
Cash flows from financing activities
Payments of long-term debt	(171,562)	(166,878)
Net cash (used) in financing activities	(171,562)	(166,878)
Net decrease in cash and cash equivalents	(1,769,972)	(1,264,551)
Cash and cash equivalents at beginning of period	7,699,335	8,664,253
Cash and cash equivalents at end of period	5,929,363	7,399,702
Supplemental disclosure of cash flow information:
Income taxes paid
Interest paid	$ 106,547	$ 115,852

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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