CONDENSED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 403,347	$ 205,362
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	320,140	275,433
Amortization	12,887	26,448
Stock based compensation	11,502	6,380
Gain on disposal of property, plant and equipment	3,102	(2,979)
Deferred income taxes		65,000
Changes in working capital components:
Trade receivables	(193,186)	(323,479)
Inventories	(76,405)	246,113
Prepaid expenses and other assets	(31,713)	(51,591)
Income taxes receivable	(33,307)	(17,925)
Accounts payable	(20,571)	(276,851)
Accrued expenses	(31,419)	(64,178)
Income taxes payable		(69,625)
Net cash provided by operating activities	364,377	18,108
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(403,212)	(358,097)
Proceeds from disposal of property, plant and equipment	9,163	24,507
Purchases of intangibles	(38,590)	(59,762)
Purchases of short-term investments	(1,510,000)	(413,934)
Proceeds on sale of short-term investments	958,948	1,027,219
Net cash used in investing activities	(983,691)	219,933
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercise of stock options	44,730	63,492
NET INCREASE IN CASH AND CASH EQUIVALENTS	(574,584)	301,533
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	1,704,300	1,704,300
CASH AND CASH EQUIVALENTS AT END OF YEAR	1,129,716	1,269,476
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid for income taxes, net of taxes received of $13,026 in 2014 and $13,026 paid in 2013.	$ (241,624)	$ 48,835