Condensed Consolidated Statements of Operations (Unaudited) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue:
Revenue from licensing agreements		$ 29,311	$ 30,131	$ 52,475	$ 51,128
Operating expenses:
Research and development		3,694,097	7,238,985	8,902,802	13,531,176
General and administrative		1,415,719	2,063,729	6,044,053	4,752,925
Wind-down expense		3,803,448		3,803,448
Total operating expenses		8,913,264	9,302,714	18,750,303	18,284,101
Loss from operations		(8,883,953)	(9,272,583)	(18,697,828)	(18,232,973)
Other income (expense):
Change in fair value of warrant liability		5,568,634	988,367	5,846,862	641,037
Conversion of CIRM loan into a grant		8,916,641		8,916,641
Gain on extinguishment of loan payable		242,931		242,931
Write-down of fixed assets		(3,332,736)		(3,332,736)
Interest income		4,069	2,139	8,312	3,533
Interest expense		(128)	(146,267)	(28,029)	(331,623)
Other income (expense), net			(33,370)	(2,100)	107,611
Total other expense, net		11,399,411	810,869	11,651,881	420,558
Net income (loss)		$ 2,515,458	$ (8,461,714)	$ (7,045,947)	$ (17,812,415)
Basic and diluted net income (loss) per share	[1]	$ 0.22	$ (1.07)	$ (0.66)	$ (2.60)
Weighted average number of common shares outstanding, basic and diluted	[1]	11,686,947	7,932,569	10,746,212	6,856,428

[1] * Adjusted for the 1-for-12 reverse stock split as discussed in Note 1.