Consolidated Statements Of Cash Flows (Unaudited) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:
Net income	$ 2,780,273	$ 5,459,506
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	2,558,962	1,760,513
Gain on sale of investments, net	(39,190)	(121,441)
Deferred income taxes	(783,607)	(231,218)
Bad Debt expense	76,049	26,819
Gain on sale of equipment	(8,592)	(209,175)
(Increase) decrease in operating assets:
Accounts receivable	(1,548,110)	(2,612,905)
Other receivables	76,552	(80,275)
Inventories	(235,849)	(2,443,101)
Refundable income taxes	172,522	(338,414)
Prepaid expenses and other current assets	73,379	33,509
Increase (decrease) in operating liabilities:
Accounts payable	595,333	1,173,263
Accrued expenses	(40,184)	167,536
Income taxes payable		1,038,451
Net cash provided by operating activities	3,677,538	3,623,068
Cash flows from investing activities:
Purchases of investments	(2,319,742)	(2,877,968)
Proceeds from sale of investments	1,736,946	2,281,792
Redemption of certificates of deposit	15,000	334,627
Purchases of property and equipment	(3,052,303)	(8,205,669)
Proceeds from sale of equipment	89,076	537,500
Net cash used in investing activities	(3,531,023)	(7,929,718)
Cash flows from financing activities:
Dividends paid		(1,307,861)
Net proceeds from debt issuance		4,975,000
Repayment of notes payable	(657,694)	(405,985)
Net cash used in financing activities	(657,694)	3,261,154
Net decrease in cash and cash equivalents	(511,179)	(1,045,496)
Cash and cash equivalents at the beginning of the period	3,306,608	2,286,226
Cash and cash equivalents at the end of the period	$ 2,795,429	$ 1,240,730