CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net income	$ 11,989,274	$ 5,732,573
Adjustments to reconcile net income to net cash provided by operating activities:
Income from discontinued operations	(1,115,825)	(1,041,234)
Depreciation and amortization	7,034,234	7,290,068
Deferred income tax benefit	(365,019)	(888,977)
Unrealized (gain) loss on put/call option	256,000	(960,000)
Compensation expense relating to stock and stock option grants	850,138	803,577
Net loss on disposal of fixed assets	36,562	117,969
Foreign currency transaction adjustment	2,593	6,685
Profit sharing and equity in earnings of OC-BVI	(2,452,355)	(174,377)
Impairment loss on long-lived assets	20,211	1,656,362
Impairment of goodwill	0	1,400,000
Distribution of earnings from OC-BVI	2,651,250	1,477,125
Change in:
Accounts receivable and costs and estimated earnings in excess of billings	(10,155,032)	1,007,753
Inventory	(1,131,409)	(209,975)
Prepaid expenses and other assets	(158,238)	(3,115,279)
Accounts payable, accrued expenses and other current liabilities, and billings in excess of costs and estimated earnings	528,013	191,500
Net cash provided by operating activities - continuing operations	7,990,397	13,293,770
Net cash provided by operating activities - discontinued operations	1,055,949	1,827,649
Net cash provided by operating activities	9,046,346	15,121,419
Cash flows from investing activities
Additions to property, plant and equipment and construction in progress	(16,202,520)	(4,549,857)
Proceeds from sale of equipment	51,590	22,427
Collections on loans receivable	1,400,448	1,633,588
Payment for land and right of way held for development	(2,655,349)	0
Net cash used in investing activities - continuing operations	(17,405,831)	(2,893,842)
Net cash used in investing activities - discontinued operations	0	(26,860)
Net cash used in investing activities	(17,405,831)	(2,920,702)
Cash flows from financing activities
Dividends paid to common shareholders	(5,092,796)	(4,464,712)
Dividends paid to preferred shareholders	(2,846)	(11,213)
Issuance (repurchase) of redeemable preferred stock	(4,362)	8,058
Payments on note payable to related party	(1,470,000)	(490,000)
Issuance of note payable to related party	784,000	686,000
Net cash used in financing activities	(5,786,004)	(4,271,867)
Net increase (decrease) in cash and cash equivalents	(14,145,489)	7,928,850
Cash and cash equivalents at beginning of period	45,482,966	37,554,116
Cash and cash equivalents at end of period	$ 31,337,477	$ 45,482,966