Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - 3 months ended Mar. 31, 2017 - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2016	70,390				(200)
Balance at Dec. 31, 2016	$ 92	$ 598,069	$ (490,573)	$ (85)	$ (2,741)	$ 104,762	$ 104,762
Net loss			(16,360)			(16,360)	(16,360)
Foreign currency translation adjustments				18		18	$ 18
Stock-based compensation expense		603				603
Exercise of stock options (in shares)	35						35
Exercise of stock options		232				232
Balance (in shares) at Mar. 31, 2017	70,425				(200)
Balance at Mar. 31, 2017	$ 92	$ 598,904	$ (506,933)	$ (67)	$ (2,741)	$ 89,255	$ 89,255