Condensed Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (1,043,915)	$ (1,628,509)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	315,385	335,435
Amortization	98,548	18,452
Stock based compensation	131,604	7,376
Net gain on sale and disposal of equipment	0	(2,324)
Loss on intangible asset abandonment	0	16,906
Changes in working capital components:
Trade receivables	468,178	1,020,699
Inventories	37,147	(501,404)
Prepaid expenses and other assets	(36,817)	749,076
Income tax receivable	189,039	(247,011)
Accounts payable	1,061,900	(446,417)
Accrued expenses	118,500	(511,614)
Net cash provided by (used in) operating activities	1,339,569	(1,189,335)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property equipment	(11,056)	(149,916)
Proceeds from sales of equipment	0	18,297
Purchases of intangible assets	(15,958)	(12,483)
Proceeds on sale of short-term investments	0	2,205,000
Net cash (used in) provided by investing activities	(27,014)	2,060,898
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from paycheck protection program loan	0	1,214,500
Payment on long-term debt	(2,773,235)	(71,603)
Proceeds from exercise of stock options	27,690	0
Net cash (used in) provided by financing activities	(2,745,545)	1,142,897
NET (DECREASE) INCREASE IN CASH	(1,432,990)	2,014,460
CASH AT BEGINNING OF PERIOD	3,693,845	963,649
CASH AT END OF PERIOD	2,260,855	2,978,109
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid for interest	24,089	37,998
Net cash received (paid for) income taxes, net	$ 208,562	$ (8,082)