CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities
Net income	$ 9,624,009	$ 6,551,980	$ 6,443,162
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,728,568	5,998,319	6,279,551
Stock compensation on share and option grants	453,686	566,593	305,002
Net (gain) loss on disposal of fixed assets	(12,082)	15,195	126,066
Profit sharing and equity from earnings of OC-BVI	(2,464,773)	(588,331)	(1,274,527)
Impairment losses	521,444	0	0
Unrealized gain on marketable securities	(73,966)	3,628	0
Change in:
Marketable securities	0	(8,500,000)	0
Accounts receivable	(4,092,859)	3,709,123	(3,950,213)
Inventory	(922,840)	(239,386)	210,895
Prepaid expenses and other assets	(679,794)	609,037	(339,878)
Accounts payable and other liabilities	1,459,223	420,601	(1,699,578)
Net cash provided by operating activities	11,540,616	8,546,759	6,100,480
Cash flows from investing activities
Additions to property, plant and equipment and construction in progress	(4,574,173)	(14,057,876)	(1,266,084)
Distribution of earnings from OC-BVI	2,287,650	202,631	1,537,725
Collections on loans receivable	1,753,771	1,733,746	1,426,732
Collections on loan receivable from OC-BVI	0	1,450,000	1,225,000
Payment for NSC option agreement	(300,000)	0	0
Release of (restriction) on cash balances for non-revolving credit facility	7,500,000	(7,500,000)	0
Net cash provided by (used in) investing activities	6,667,248	(18,171,499)	2,923,373
Cash flows from financing activities
Dividends paid	(4,450,392)	(4,850,914)	(4,368,047)
Issuance (repurchase) of redeemable preferred stock, net	1,154	1,542	(10,674)
Principal repayments of long term debt	(10,125,150)	(1,531,946)	(2,944,085)
Capital contribution from non-controlling interest	135,000	0	0
(Repayment of ) borrowing on non-revolving credit facility	(7,500,000)	7,500,000	0
Net cash provided by (used in) financing activities	(21,939,388)	1,118,682	(7,322,806)
Net increase (decrease) in cash and cash equivalents	(3,731,524)	(8,506,058)	1,701,047
Cash and cash equivalents at beginning of period	37,624,179	46,130,237	44,429,190
Cash and cash equivalents at end of period	$ 33,892,655	$ 37,624,179	$ 46,130,237