Unaudited Condensed Consolidated Statement of Stockholders' Equity - 6 months ended Jun. 30, 2018 - 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]	Deferred Compensation Expense [Member]	Total
Balance at Dec. 31, 2017	$ 70	$ 317,932	$ 3,511	$ 2,977	$ (70)	$ 70	$ 324,490
Balance (in shares) at Dec. 31, 2017					(2)
Net loss			(28,813)				(28,813)
Issuance of common stock and other	5	589					594
Translation adjustment				(2,205)			(2,205)
Balance at Jun. 30, 2018	$ 75	$ 318,521	$ (25,302)	$ 772	$ (70)	$ 70	$ 294,066
Balance (in shares) at Jun. 30, 2018					(2)