CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows From Operating Activities:
Net loss	$ (187,364)	$ (138,740)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	121	193
Amortization of deferred debt costs and debt discount	1,014	4,658
Accretion of back-end facility fee	21	0
Loss on disposal of property and equipment	44	0
Stock-based compensation expense	20,082	8,494
Interest expense — Payment-in-kind (PIK)	765	0
Change in fair value of derivative instruments—warrants	(216)	(151)
Common stock issued for interest on Notes	0	2,445
Debt conversion expense	1,209	25,615
Changes in operating assets and liabilities:
Accounts receivable	(5,036)	0
Inventories	(7,405)	0
Security deposit	25	0
Prepaid expenses and other current assets	(7,671)	1,561
Accounts payable and accrued expenses	2,145	3,452
Deferred revenues, net	1,927	0
Accrued interest expense on senior convertible notes	287	486
Total Adjustments	7,312	46,753
Net Cash used in Operating Activities	(180,052)	(91,987)
Cash Flows From Investing Activities:
Net sales of available-for-sale securities	0	50,097
Additions to property and equipment	(48)	(297)
Net Cash (used in) provided by Investing Activities	(48)	49,800
Cash Flows From Financing Activities:
Proceeds of sale of common stock	121,951	89,845
Proceeds from borrowings, net of issuance costs	95,140	0
Payment for deferred financing costs	(1,591)	0
Fees and expenses — note conversions	0	(434)
Fees and expenses — sale of common stock	(347)	0
Proceeds from exercise of stock options	347	213
Net Cash provided by Financing Activities	215,500	89,624
Net increase in cash and cash equivalents	35,400	47,437
Cash and cash equivalents at beginning of period	82,387	61,653
Cash and cash equivalents at end of period	117,787	109,090
Supplementary disclosure of cash flow information:
Cash paid for interest on senior convertible notes	698	2,969
Cash paid for taxes	20	45
Supplementary disclosure of non-cash investing and financing activities:
Conversion of senior convertible notes to Synergy Common Stock	4,912	82,274
Amount added to principal of term loan for Payment-in-kind (PIK) interest	765	0
Non-cash tenant improvement allowance	$ 587	$ 0