Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
Mar. 28, 2015	Mar. 29, 2014
Operating activities:
Net income	$ 1,743,763us-gaap_NetIncomeLoss	$ 1,556,811us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	606,079us-gaap_DepreciationAndAmortization	640,084us-gaap_DepreciationAndAmortization
Provision for losses on accounts receivable	23,057us-gaap_ProvisionForDoubtfulAccounts	109,684us-gaap_ProvisionForDoubtfulAccounts
Gain on sale of equipment and patents	(46,751)
Increase in cash value of life insurance	(83,142)	(115,580)
Deferred compensation	(40,758)	(38,392)
Stock compensation expense	13,318us-gaap_ShareBasedCompensation	13,318us-gaap_ShareBasedCompensation
Changes in operating assets and liabilities:
Accounts receivable	(2,306,004)us-gaap_IncreaseDecreaseInReceivables	996,309us-gaap_IncreaseDecreaseInReceivables
Inventories	1,396,734us-gaap_IncreaseDecreaseInInventories	148,574us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other assets	(293,976)	110,924
Accounts payable and accrued expenses	763,037	(1,671,755)
Net cash provided by operating activities	1,775,357	1,749,977
Investing activities:
Purchases of property and equipment	(140,576)	(438,499)
Proceeds from sale of equipment and patents	47,339
Payments for other assets	(52,729)	(65,542)
Net cash used for investing activities	(145,966)	(504,041)
Financing activities:
Dividends paid	(3,853,712)us-gaap_PaymentsOfDividends	(824,169)us-gaap_PaymentsOfDividends
Common stock issued upon exercise of options	180,708	258,497
Net cash used for financing activities	(3,673,004)	(565,672)
Effect of exchange rates on cash	(63,830)	(101,049)
Increase (Decrease) in cash and cash equivalents	(2,107,443)	579,215
Cash and cash equivalents at beginning of period	6,865,931	5,424,521
Cash and cash equivalents at end of period	$ 4,758,488	$ 6,003,736

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.