CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Net cash provided by operating activities	$ 5,388,005	$ 13,529,071
Cash flows from investing activities
Additions to property, plant and equipment and construction in progress	(13,709,598)	(3,016,713)
Proceeds from sale of equipment	51,590	18,827
Collections on loans receivable	1,041,787	1,297,419
Payment for land and rights of way held for development	(2,168,180)	(665,270)
Net cash used in investing activities	(14,784,401)	(2,365,737)
Cash flows from financing activities
Dividends paid to common shareholders	(3,818,499)	(3,346,477)
Dividends paid to non-controlling interests	0	0
Dividends paid to preferred shareholders	(2,846)	(8,665)
Issuance (repurchase) of redeemable preferred stock	10,258	12,456
Proceeds received from exercise of stock options	0	0
Repayment of note payable to related party	(392,000)	(490,000)
Issuance of note payable to related party	784,000	392,000
Net cash used in financing activities	(3,419,087)	(3,440,686)
Net increase (decrease) in cash and cash equivalents	(12,815,483)	7,722,648
Cash and cash equivalents at beginning of period	47,182,966	39,254,116
Cash and cash equivalents at end of period	34,367,483	46,976,764
Interest paid in cash	6,539	7,062
Non-cash investing and financing activities
Conversion (on a one-to-one basis) of 5,426 and 12,214, respectively, shares of redeemable preferred stock to common stock	3,256	7,328
Dividends declared but not paid	1,275,066	1,120,176
Transfers from inventory to property, plant and equipment and construction in progress	304,279	228,549
Transfers from construction in progress to property, plant and equipment	492,252	2,109,960
Transfers from other assets to construction in progress	1,253,299	0
Common Stock [Member]
Non-cash investing and financing activities
Stock Issued	441,161	203,551
Preferred Stock [Member]
Non-cash investing and financing activities
Stock Issued	$ 96,317	$ 118,485