Consolidated Statements of Shareholders' Equity (Deficit) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Temporary Equity Associated with Noncontrolling Interests [Member]	Preferred Stock [Member] Series A Preferred Stock [Member]	Total
Balance (in shares) at Dec. 31, 2017	15,291,884
Balance at Dec. 31, 2017		$ 212,785,000	$ (2,178,000)	$ (246,640,000)	$ (94,000)			$ (36,127,000)
Stock options exercises and proceeds related thereto (in shares)	20,300
Stock options exercises and proceeds related thereto		50,000						50,000
Compensatory stock issuances, net of forfeitures (in shares)	533,177
Compensatory stock issuances, net of forfeitures
Deferred stock-based compensation costs		1,323,000						$ 1,323,000
Redemption and retirement of shares (in shares)	(281,787)							(281,787)
Redemption and retirement of shares		(723,000)						$ (723,000)
Comprehensive income (loss)			5,736,000	7,856,000	(244,000)			13,348,000
Balance (in shares) at Dec. 31, 2018	15,563,574
Balance at Dec. 31, 2018		213,435,000	3,558,000	(238,784,000)	(338,000)			$ (22,129,000)
Stock options exercises and proceeds related thereto (in shares)	469,701							469,701
Stock options exercises and proceeds related thereto		1,215,000						$ 1,215,000
Compensatory stock issuances, net of forfeitures (in shares)	209,500
Compensatory stock issuances, net of forfeitures
Deferred stock-based compensation costs		1,712,000						$ 1,712,000
Redemption and retirement of shares (in shares)	(357,461)							(357,461)
Redemption and retirement of shares		(2,517,000)						$ (2,517,000)
Comprehensive income (loss)			(3,558,000)	26,443,000	(233,000)			22,652,000
Cumulative effects from adoption of new lease standard (Note 2)				555,000				555,000
Accretion of discount associated with issuance of subsidiary equity		(50,000)				50,000		(50,000)
Preferred dividends		(1,103,000)						(1,103,000)
Contributions by preferred shareholders						50,500,000	40,000,000
Costs associated with contributions by preferred shareholders						(1,500,000)
Balance (in shares) at Dec. 31, 2019	15,885,314
Balance at Dec. 31, 2019		$ 212,692,000		$ (211,786,000)	$ (571,000)	$ 49,050,000	$ 40,000,000	$ 335,000