Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Operating activities:
Net income	$ 2,811,193	$ 2,572,964
Adjustments to reconcile net income to net cash (used) provided by operating activities
Depreciation	795,452	755,334
Amortization	183,385	114,822
Stock compensation expense	428,439	385,732
Deferred income taxes	(185,162)	(348,713)
Change in estimated cost of environmental remediation		(100,000)
Changes in operating assets and liabilities
Accounts receivable	(76,021)	(1,635,185)
Inventories	(1,127,005)	(5,015,837)
Prepaid expenses and other current assets	271,550	(137,266)
Accounts payable	(1,031,524)	2,208,634
Other accrued liabilities	(7,239)	64,430
Total adjustments	(748,125)	(3,708,048)
Net cash provided (used) by operating activities	2,063,068	(1,135,084)
Investing activities:
Purchase of property, plant and equipment	(940,713)	(937,083)
Purchase of patents and trademarks	(101,853)	(117,405)
Acquisition of Pac-Kit Safety Equipment Company	(3,126,986)
Net cash used by investing activities	(4,169,552)	(1,054,488)
Financing activities:
Net borrowings of long-term debt	4,046,484	4,368,000
Distributions to shareholders	(771,582)	(655,832)
Purchase of treasury stock	(133,738)	(1,566,290)
Issuance of common stock	287,269	162,475
Net cash provided by financing activities	3,428,433	2,308,353
Effect of exchange rate changes	(70,022)	(36,429)
Net increase in cash and cash equivalents	1,251,927	82,351
Cash and cash equivalents at beginning of year	6,601,416	6,519,065
Cash and cash equivalents at end of year	7,853,343	6,601,416
Supplemental cash flow information
Cash paid for income taxes	1,293,036	464,576
Cash paid for interest expense	$ 390,418	$ 278,165