CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Net cash provided by (used in) operating activities	$ 2,479,647	$ (2,126,048)
Cash flows from investing activities
Additions to property, plant and equipment and construction in progress	(520,756)	(661,662)
Proceeds from sale of equipment	600	0
Distribution of earnings from OC-BVI	0	727,200
Collections on loans receivable	421,149	467,816
Net cash provided by (used in) investing activities	(99,007)	533,354
Cash flows from financing activities
Dividends paid	(1,105,856)	(1,103,587)
Proceeds received from exercise of stock options	145,147	0
Principal repayments of long term debt	0	(5,301,327)
Repayment of demand loan payable	(500,000)	0
Net cash provided by (used in) financing activities	(1,460,709)	(6,404,914)
Effect of exchange rate changes on cash	121,308	64,103
Net increase (decrease) in cash and cash equivalents	1,041,239	(7,933,505)
Cash and cash equivalents at beginning of period	35,713,689	33,626,516
Cash and cash equivalents at end of period	36,754,928	25,693,011
Interest paid in cash	39,962	110,330
Non-cash investing and financing activities
Dividends declared but not paid	1,107,834	1,105,193
Transfers from (to) inventory to (from) property, plant and equipment and construction in progress	(647)	57,543
Transfer from costs and estimated earnings in excess of billings - construction project to accounts receivable	239,400	0
Transfers from construction in progress to property, plant and equipment	95,786	329,265
Transfer from construction in progress to costs and estimated earnings in excess of billings - construction project	77,841	0
Common Stock [Member]
Non-cash investing and financing activities
Issuance of 0 and 12,302, respectively, shares of common stock for services rendered	$ 0	$ 173,458