CONDENSED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 135,007	$ 648,770
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	659,528	635,607
Amortization	25,040	25,775
Stock based compensation	21,743	18,415
Gain on sale and disposal of property, plant and equipment		(45,659)
Deferred income taxes	18,000	(10,000)
Loss on intangible asset abandonment	45,873
Changes in working capital components:
Trade receivables	(68,866)	(45,475)
Inventories	510,845	(75,708)
Prepaid expenses and other assets	752	17,287
Income tax receivable	60,873	(121,776)
Accounts payable	49,064	(161,113)
Accrued expenses	8,202	30,625
Net cash provided by operating activities	1,466,061	916,748
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant, equipment and construction in progress	(2,866,671)	(434,463)
Proceeds from sales of equipment and vehicles		61,763
Purchases of intangibles	(53,138)	(56,998)
Purchases of short-term investments	(650,000)	(2,716,000)
Proceeds on sale of short-term investments	2,416,000	2,414,877
Net cash used in investing activities	(1,153,809)	(730,821)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercise of stock options		45,987
NET INCREASE IN CASH AND CASH EQUIVALENTS	312,252	231,914
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	1,936,214	1,704,300
CASH AND CASH EQUIVALENTS AT END OF PERIOD	2,248,466	1,936,214
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Construction in progress included in construction payable	333,339
Cash paid for income taxes	$ 11,127	$ 401,776