CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash Flows From Operating Activities:
Net loss	$ (59,941)	$ (27,389)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	38	34
Amortization of deferred financing costs	4,153	617
Stock-based compensation expense	$ 1,202	2,405
Accretion of discount/premium on available for sale securities		(13)
Change in fair value of derivative instruments—warrants	$ (260)	268
Common stock issued for interest on Notes	2,445	0
Debt conversion expense	25,615	0
Transaction fees on Note conversions	(435)	0
Changes in operating assets and liabilities:
Security deposit	0	(56)
Accounts payable and accrued expenses	(800)	(2,952)
Prepaid expenses and other current assets	(56)	187
Accrued interest expense on Senior Convertible Debentures	487	3,750
Total Adjustments	32,389	4,240
Net Cash used in Operating Activities	(27,552)	(23,149)
Cash Flows From Investing Activities:
Net sales (purchases) of available-for-sale securities	50,097	(50,000)
Additions to property and equipment	(43)	(8)
Net Cash provided by (used in) Investing Activities	50,054	(50,008)
Cash Flows From Financing Activities:
Proceeds of sale of common stock	0	5,558
Fees and expenses — sale of common stock	0	(153)
Net Cash provided by Financing Activities	0	5,405
Net increase (decrease) in cash and cash equivalents	22,502	(67,752)
Cash and cash equivalents at beginning of period	61,653	146,470
Cash and cash equivalents at end of period	84,155	78,718
Supplementary disclosure of cash flow information:
Cash paid for taxes	45	122
Supplementary disclosure of non-cash investing and financing activities:
Conversion of Senior Convertible Debentures to Synergy Common Stock	$ 82,274	$ 0