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CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	8 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Apr. 30, 2014
Statement of Comprehensive Income [Abstract]
Net loss	$ (5,810)	$ (6,858)	$ (11,781)	$ (27,404)
Other comprehensive income (loss), net of taxes:
Unrealized loss resulting from changes in fair value of derivative instruments	0	0	0	(36)
Realized loss on derivative instruments reclassified into earnings	0	0	0	655
Unrealized (loss) gain resulting from changes in fair value of marketable securities	19	(75)	(51)	12
Other comprehensive (loss) income	19	(75)	(51)	631
Comprehensive loss	(5,791)	(6,933)	(11,832)	(26,773)
Less: Net (loss) income attributable to noncontrolling interests	208	(9)	1,188	(4,309)
Comprehensive loss attributable to common stockholders	$ (5,999)	$ (6,924)	$ (13,020)	$ (22,464)

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