Acquisitions and Divestitures (Tables)

12 Months Ended

Dec. 31, 2017

Business Combinations [Abstract]

Unaudited Pro Forma Operating Results

	Year Ended December 31,
In thousands	2017			2016
Pro forma total revenues	$	107,853		$	91,532
Pro forma net loss attributable to common stockholders		(48,888	)		(46,093	)
Pro forma net loss per common share, basic and diluted		(1.99	)		(4.27	)