Overview and Basis of Presentation - Major Components of Statements of Operations Data Comprising Income (Loss) from Discontinued Operations (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) $ / shares shares
Operating expenses:
Research and development	$ 332
General and administrative	9
Total operating expenses	341
Operating Income (loss)	(341)
Other income	400
Income (loss)	$ 59
Class P Common Units | Discontinued Operations
Operating expenses:
Weighted-average Class P common units - profits interests - outstanding, basic and diluted | $ / shares	$ 0.00
Weighted-average Class P common units - profits interests - outstanding, basic and diluted | shares	39,000
Class P Preferred Units | Discontinued Operations
Operating expenses:
Weighted-average Class P preferred units outstanding, basic and diluted | $ / shares	$ 0.00
Weighted-average Class P preferred units outstanding, basic and diluted | shares	51,000