Consolidated Statements Of Cash Flows (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income	$ 1,094,989	$ 1,925,771
Adjustments to reconcile net income to net cash flows from operating activities, net of acquisition:
Depreciation and amortization	587,750	572,472
Loss (gain) on sale of investments, net	(17,985)	2,597
Deferred income taxes	(185,805)	(119,129)
Bad Debt Expense	6,384	20,000
(Increase) decrease in operating assets:
Accounts receivable	(526,979)	(1,573,284)
Other receivables	68,267	29,801
Inventories	(250,982)	(766,680)
Refundable income taxes	41,316	906,748
Prepaid expenses and other current assets	39,750	31,396
Increase (decrease) in operating liabilities:
Accounts payable	211,227	(402,422)
Accrued expenses	201,462	86,382
Income taxes payable	279,402	430,246
Net cash provided by operating activities	1,548,796	1,143,898
Cash flows from investing activities:
Purchases of investments	(318,123)	(445,049)
Proceeds from sale of investments	404,028	234,388
Purchases of property and equipment	(231,243)	(353,455)
Net cash (used in) provided by investing activities	(145,338)	(564,116)
Cash flows from financing activities:
Checks written in excess of bank balances	(258,594)	(274,137)
Purchases of treasury stock	(176,606)	(846,290)
Repayment of notes payable	(926,869)	(613,503)
Net cash used in financing activities	(1,362,069)	(1,733,930)
Net (decrease) increase in cash and cash equivalents	41,389	(1,154,148)
Cash and cash equivalents at the beginning of the period	1,115,150	3,229,939
Cash and cash equivalents at the end of the period	$ 1,156,539	$ 2,075,791