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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Cash flows from operating activities      
Net income $ 9,148,489 $ 9,624,009 $ 6,551,980
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 5,472,116 7,728,568 5,998,319
Bad debt expense 32,933 62,909 0
Compensation expense relating to stock and stock option grants 381,976 453,686 566,593
Net (gain) loss on disposal of fixed assets 14,562 (12,082) 15,195
Foreign currency transaction adjustment 244,225 0 0
Profit sharing and equity from earnings of OC-BVI (1,337,352) (2,464,773) (588,331)
Impairment losses 200,000 521,444 0
Unrealized (gain) loss on marketable securities (17,137) (73,966) 3,628
Change in:      
Marketable securities 0 0 (8,500,000)
Accounts receivable (6,387,463) (4,092,859) 3,709,123
Inventory (65,637) (922,840) (239,386)
Prepaid expenses and other assets (930,839) (679,794) 609,037
Accounts payable and other liabilities 1,987,661 1,412,524 420,601
Net cash provided by (used in) operating activities 8,743,534 11,556,826 8,546,759
Cash flows from investing activities      
Additions to property, plant and equipment and construction in progress (4,315,389) (4,574,173) (14,057,876)
Proceeds from sale of equipment 13,740 0 0
Distribution of earnings from OC-BVI 1,439,250 2,287,650 202,631
Collections on loans receivable 1,812,533 1,753,771 1,733,746
Collections on loan receivable from OC-BVI 0 0 1,450,000
Payment for investment in land (2,125,566) 0 0
Payment for NSC option agreement 0 (300,000) 0
Release of previously restricted cash balances 0 7,500,000 (7,500,000)
Net cash provided by (used in) investing activities (3,175,432) 6,667,248 (18,171,499)
Cash flows from financing activities      
Dividends paid (4,399,091) (4,450,392) (4,850,914)
Issuance (repurchase) of redeemable preferred stock, net 9,313 1,154 1,542
Proceeds received from exercise of stock options 500,505 0 0
Principal repayments of long term debt (1,724,025) (10,125,150) (1,531,946)
Capital contribution from non-controlling interest 142,105 135,000 0
Borrowings (repayment) of non-revolving credit facility 0 (7,500,000) 7,500,000
Net cash provided by (used in) financing activities (5,471,193) (21,939,388) 1,118,682
Effect of exchange rate changes on cash (363,048) (16,210) 0
Net increase (decrease) in cash and cash equivalents (266,139) (3,731,524) (8,506,058)
Cash and cash equivalents at beginning of period 33,892,655 37,624,179 46,130,237
Cash and cash equivalents at end of period $ 33,626,516 $ 33,892,655 $ 37,624,179