CONDENSED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (84,467)	$ 542,318
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	490,275	477,287
Amortization	18,831	19,332
Stock based compensation	16,088	14,958
Gain on sale and disposal of property, plant and equipment		(45,659)
Loss on intangible asset abandonment	45,873
Changes in working capital components:
Trade receivables	(186,283)	1,800
Inventories	352,289	(134,187)
Prepaid expenses and other assets	(18,354)	(29,867)
Income taxes receivable	(9,099)	(85,540)
Accounts payable	80,632	264,786
Accrued expenses	91,007	151,803
Net cash provided by operating activities	796,792	1,177,031
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant, equipment and construction in progress	(1,195,840)	(407,119)
Proceeds from sales of equipment and vehicles		61,763
Purchases of intangibles	(41,639)	(45,629)
Purchases of short-term investments	(650,000)	(2,296,000)
Proceeds on sale of short-term investments	2,191,000	1,964,878
Net cash provided by (used in) investing activities	303,521	(722,107)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercise of stock options		44,730
NET INCREASE IN CASH AND CASH EQUIVALENTS	1,100,313	499,654
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	1,936,214	1,704,300
CASH AND CASH EQUIVALENTS AT END OF PERIOD	3,036,527	2,203,954
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Construction payables incurred for building expansion and ERP project	569,843
Cash paid for income taxes	$ 10,901	$ 331,648