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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Net cash provided by (used in) operating activities $ 3,177,771 $ (2,063,882)
Cash flows from investing activities    
Additions to property, plant and equipment and construction in progress (1,129,191) (963,784)
Distributions from OC-BVI 757,500 242,400
Collections of loans receivable 452,122 450,341
Payment for NSC option agreement 0 (300,000)
Net cash provided by (used in) investing activities 80,431 (571,043)
Cash flows from financing activities    
Dividends paid (1,096,025) (1,093,734)
Issuance (repurchase) of redeemable preferred stock, net (4,159) (2,705)
Proceeds received from exercise of stock options 232,734 0
Principal repayments of long term debt (421,508) (8,897,334)
Net cash provided by (used in) financing activities (1,288,958) (9,993,773)
Net increase (decrease) in cash and cash equivalents 1,969,244 (12,628,698)
Cash and cash equivalents at beginning of period 33,892,655 37,624,179
Cash and cash equivalents at end of period 35,861,899 24,995,481
Interest paid in cash 104,503 286,922
Non-cash investing and financing activities    
Issuance of 11,131 and 10,800, respectively, shares of common stock for services rendered 82,369 92,664
Dividends declared but not paid 1,099,752 1,095,119
Transfers from inventory to property, plant and equipment $ 181,875 $ 139,507