Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income	$ 1,904,269	$ 626,881
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	357,594	330,374
Deferred income taxes	(88,566)	25,315
Provision for bad debts	88,289	15,935
Provision for slow moving and obsolete inventory	9,756	35,404
Other operating non-cash items	(1,572)	(483)
Cash used related to 2019 chemical incident		(200,665)
Gain on insurance settlement		(126,210)
Changes in assets and liabilities:
Trade accounts receivable	(2,110,546)	711,965
Receivables due from affiliated companies	358,826	(233,430)
Inventories	(1,068,795)	(1,840,769)
Prepaid expenses and other current assets	(162,596)	(68,564)
Accounts payable – trade	1,174,548	949,090
Income taxes payable	576,626
Accrued expenses payable	169,969	62,971
Net cash provided by operating activities	1,207,802	287,814
Cash flows from investing activities:
Insurance proceeds received for damaged machinery and equipment		411,657
Purchases of property, plant and equipment	(915,899)	(541,104)
Net cash used in investing activities	(915,899)	(129,447)
Cash flows from financing activities:
Payments on long-term debt	(130,092)	(126,673)
Dividends paid to common shareholders	(284,454)
Net cash used in financing activities	(414,546)	(126,673)
Effect of exchange rate on cash	976	(1,845)
Net (decrease) increase in cash and restricted cash	(121,667)	29,849
Cash and restricted cash at beginning of period	11,601,152	8,010,420
Cash and restricted cash at end of period	11,479,485	8,040,269
Supplemental disclosure of cash flow information:
Cash paid for interest during period	32,606	36,261
Cash paid for income taxes during period		45,000
Cash paid under operating lease	23,700	23,700
Cash	11,161,761	6,148,351
Restricted cash	317,724	1,891,918
Total cash and restricted cash	$ 11,479,485	$ 8,040,269