Consolidated Statement of Stockholders' Equity - USD ($)	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	NoncontrollingInterest [Member]
Beginning Balances at Dec. 31, 2013	$ 33,358,416	$ 11,574	$ 334,810,312	$ (333,078,313)	$ 31,614,843
Increase (Decrease) in Stockholders' Equity
Net income	29,871,377	0	0	7,744,844	22,126,533
Issuance of Common Shares	171,371,150	0	(621,681)	0	171,992,831
Cash dividends paid to noncontrolling interests	(20,522,827)	0	0	0	(20,522,827)
Issuance of Class A common shares for equity plan exercises	236,254	556	235,698	0	0
Class A common shares sold directly to employees	(98,000)	258	97,742	0	0
Amortization of equity plan compensation	66,006	0	779	0	65,227
Noncontrolling Interest, Decrease from Deconsolidation	(205,276,607)	0	0	0	(205,276,607)
Ending Balances at Dec. 31, 2014	9,201,769	12,388	334,522,850	(325,333,469)	0
Increase (Decrease) in Stockholders' Equity
Net income	59,230,829	0	0	59,230,829	0
Issuance of Class A common shares for equity plan exercises	88,235	49	88,186	0	0
Class A common shares sold directly to employees	0
Amortization of equity plan compensation	19,227	0	19,227	0	0
Ending Balances at Dec. 31, 2015	$ 68,540,060	$ 12,437	$ 334,630,263	$ (266,102,640)	$ 0