Consolidated Statement of Shareholders' Deficit (Unaudited) - 3 months ended Mar. 31, 2019 - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total
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)
Cumulative effects from adoption of new lease standard (Note 2)				555,000		$ 555,000
Stock option exercises and proceeds related thereto (in shares)	419,500					419,500
Stock option exercises and proceeds related thereto		1,065,000				$ 1,065,000
Deferred stock-based compensation costs		412,000				$ 412,000
Redemption and retirement of shares (in shares)	(5,944)					(5,944)
Redemption and retirement of shares		(21,000)				$ (21,000)
Comprehensive income			(1,513,000)	5,713,000	(58,000)	4,142,000
Balance (in shares) at Mar. 31, 2019	15,977,130
Balance at Mar. 31, 2019		$ 214,891,000	$ 2,045,000	$ (232,516,000)	$ (396,000)	$ (15,976,000)