CONSOLIDATED STATEMENT OF STOCKHOLDERS' DEFICIT (Unaudited) - 3 months ended Mar. 31, 2017 - USD ($) shares in Thousands, $ in Thousands	Total	Additional Paid-In Capital	Accumulated Deficit	Comprehensive Loss	Noncontrolling Interests	Class A Common Stock	Class A Common Stock Common Stock	Class B Common Stock	Class B Common Stock Common Stock
Beginning balance at Dec. 31, 2016	$ (24,550)	$ 348,434	$ (373,308)	$ (68)	$ (24)		$ 406		$ 10
Balance (in shares) at Dec. 31, 2016						40,572	40,572	988	988
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(224)		(224)		0
Other comprehensive loss	(18)			(18)
Issuances of Class A common stock	358	355					$ 3
Issuances of Class A common stock (in shares)							320
Stock-based compensation	1,257	1,257
Ending balance at Mar. 31, 2017	$ (23,177)	$ 350,046	$ (373,532)	$ (86)	$ (24)		$ 409		$ 10
Balance (in shares) at Mar. 31, 2017						40,892	40,892	988	988