Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 8,403,968	$ 9,616,683
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,489,215	1,373,337
Deferred income taxes	(32,495)	68,844
Stock based compensation	407,860	312,610
Provision for bad debts	311,123	196,887
Provision for slow moving and obsolete inventory	24,450	46,175
Impairment of equipment		65,725
Other operating non-cash items	1,975	(549)
Cash used related to 2019 chemical incident		(200,665)
Gain on insurance settlement		(201,210)
Changes in assets and liabilities:
Trade accounts receivable	(1,528,317)	(1,389,520)
Receivables due from affiliated companies	284,105	(536,000)
Inventories	(3,667,947)	(3,666,860)
Prepaid expenses and other current assets	(834,185)	(324,764)
Accounts payable – trade	911,613	918,625
Income taxes payable	45,295
Accrued expenses payable	(310,963)	(72,113)
Net cash provided by operating activities	5,505,697	6,207,205
Cash flows from investing activities:
Insurance proceeds received for damaged machinery and equipment		486,657
Purchases of property, plant and equipment	(7,442,783)	(1,836,756)
Net cash used in investing activities	(7,442,783)	(1,350,099)
Cash flows from financing activities:
Payments on long term debt	(753,284)	(510,437)
Proceeds from long term debt	4,989,789
Payments for taxes related to net share settlements of stock awards	(37,800)	(19,991)
Proceeds from CARES Act note		1,556,800
Repayment of CARES Act note		(1,556,800)
Dividends paid to common shareholders	(1,138,737)	(757,362)
Repurchase of common stock	(39,112)
Proceeds from exercise of stock options		20,700
Net cash provided by (used in) financing activities	3,020,856	(1,267,090)
Effect of exchange rate on cash	13	716
Net increase in cash and restricted cash	1,083,783	3,590,732
Cash and restricted cash at beginning of period	11,601,152	8,010,420
Cash and restricted cash at end of period	12,684,935	11,601,152
Supplemental disclosure of cash flow information:
Cash paid for interest during period	125,432	141,021
Cash paid for income taxes during period	2,256,938	2,627,384
Finance lease right to use assets exchanged for finance lease liabilities		96,039
Cash paid under operating lease	94,800	94,800
Cash	12,684,935	11,123,726
Restricted cash		477,426
Total cash and restricted cash	$ 12,684,935	$ 11,601,152