Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income	$ 7,776,445	$ 8,736,032
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,105,542	1,020,179
Deferred income taxes	32,577	88,377
Stock based compensation	55,780	22,220
Provision for bad debts	170,978	213,398
Provision for slow moving and obsolete inventory	24,450	47,146
Impairment of equipment		65,725
Other operating non-cash items	(690)	(1,061)
Cash used related to 2019 chemical incident		(200,665)
Gain on insurance settlement		(126,210)
Changes in assets and liabilities:
Trade accounts receivable	(9,070,929)	(9,343,556)
Receivables due from affiliated companies	871,356	(145,840)
Inventories	(3,637,494)	(2,812,905)
Prepaid expenses and other current assets	(710,424)	(43,784)
Accounts payable – trade	3,116,589	2,709,747
Income taxes payable		267,402
Accrued expenses payable	678,139	881,019
Net cash provided by operating activities	412,319	1,377,224
Cash flows from investing activities:
Insurance proceeds received for damaged machinery and equipment		411,657
Purchases of property, plant and equipment	(4,956,102)	(1,549,077)
Net cash used in investing activities	(4,956,102)	(1,137,420)
Cash flows from financing activities:
Payments on long-term debt	(513,990)	(381,616)
Proceeds from term loan	4,989,789
Proceeds from CARES Act note		1,556,800
Repayment of CARES Act note		(1,556,800)
Dividends paid to common shareholders	(853,482)	(567,726)
Proceeds from exercise of stock options		20,700
Net cash provided by (used in) financing activities	3,622,317	(928,642)
Effect of exchange rate on cash	17	(602)
Net decrease in cash and restricted cash	(921,449)	(689,440)
Cash and restricted cash at beginning of period	11,601,152	8,010,420
Cash and restricted cash at end of period	10,679,703	7,320,980
Supplemental disclosure of cash flow information:
Cash paid for interest during period excluding capitalized interest	95,858	107,147
Cash paid for income taxes during period	2,175,938	2,029,484
Cash paid under operating lease	71,100	71,100
Cash	10,679,703	6,581,944
Restricted cash		739,036
Total cash and restricted cash	10,679,703	7,320,980
Noncash lease activities:
Finance lease right to use assets exchanged for finance lease liabilities		$ 96,039