Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net loss	$ (997,340)	$ (1,505,550)
Adjustments to reconcile net loss to net cash used in operating activities
Stock-based compensation	97,110	50,373
Depreciation and amortization	250,949	255,644
(Increase)/decrease in operating assets
Accounts receivable	(51,829)	228,699
Contract assets	(179,450)	(533,007)
Inventories	(512,886)	(216,160)
Tax receivable		0
Other current assets	109,244	251,987
Increase/(decrease) in operating liabilities
Accounts payable	16,825	(314,625)
Accrued expenses	61,402	264,123
Contract liabilities	(930,041)	(53,150)
Total adjustments	(423,077)	(66,116)
Net cash used in operating activities	(1,420,417)	(1,571,666)
Cash flows from investing activities:
Net proceeds from sale of assets	10,000	0
Patents	(27,540)	0
Capital expenditures	(177,053)	(26,744)
Net cash used in investing activities	(194,593)	(26,744)
Cash flows from financing activities
Payments of long-term debt	(1,765,508)	(171,562)
Net cash used in financing activities	(1,765,508)	(171,562)
Net decrease in cash and cash equivalents	(3,380,518)	(1,769,972)
Cash and cash equivalents at beginning of period	16,651,371	7,699,335
Cash and cash equivalents at end of period	13,270,853	5,929,363
Supplemental disclosure of cash flow information:
Income taxes paid	0	0
Interest paid	$ 8,953	$ 106,547