Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating activities:
Net income	$ 8,098,766	$ 5,513,608
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	2,427,557	2,181,060
Amortization	1,324,423	1,251,662
Stock compensation expense	1,259,079	968,467
Deferred income taxes	60,937	162,637
Non-cash lease expense	86,042	19,222
Provision for doubtful accounts	778,869	290,128
Pension settlement	526,857
Changes in operating assets and liabilities
Accounts receivable	(2,028,341)	(784,562)
Inventories	(10,049,513)	2,089,861
Prepaid expenses and other current assets	159,078	666,070
Accounts payable	460,179	(1,525,060)
Other accrued liabilities	2,617,103	3,869,138
Total adjustments	(2,377,730)	9,188,623
Net cash provided by operating activities	5,721,036	14,702,231
Investing activities:
Purchase of property, plant and equipment	(2,569,174)	(1,680,479)
Net cash used by investing activities	(13,951,902)	(1,680,479)
Financing activities:
Net borrowings (repayments) of long-term debt	5,526,760	(7,042,708)
Repayments on mortgage	(266,667)	(266,667)
Distributions to stockholders	(1,604,706)	(1,608,956)
Cash settlement of stock options	(1,644,118)	(1,687,782)
Purchase of treasury stock	(286,988)
Issuance of common stock	58,754
Net cash provided by (used in) financing activities	5,291,082	(10,606,113)
Effect of exchange rate changes	285,277	(2,799)
Net (decrease) increase in cash and cash equivalents	(2,654,507)	2,412,841
Cash and cash equivalents at beginning of year	6,821,883	4,409,042
Cash and cash equivalents at end of year	4,167,376	6,821,883
Supplemental cash flow information:
Cash paid for income taxes	755,337	422,339
Cash paid for interest expense	930,357	$ 1,863,961
PPP Loan
Financing activities:
Proceeds from PPP Loan	3,508,047
Med-Nap, LLC
Investing activities:
Acquisition	(9,307,518)
First Aid Central
Operating activities:
Net income	300,000
Investing activities:
Acquisition	$ (2,075,210)