Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities
Net loss	$ (22,949)	$ (3,389)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	9	5
Noncash interest expense	685
Stock-based compensation	512	50
Issuance of common stock in connection with a license agreement	3,172
Change in fair value of obligation to issue shares to Eiccose	204
Change in fair value of warrant liability	165
Change in assets and liabilities:
Prepaid expenses and other current assets	(253)	(192)
Other non-current assets	(91)	(21)
Accounts payable	(701)	309
Accrued and other liabilities	(284)	67
Net cash used in operating activities	(19,531)	(3,171)
Investing activities
Cash received from merger transaction	28,018
Purchase of property and equipment	(20)	(23)
Net cash provided by (used in) investing activities	27,998	(23)
Financing activities
Proceeds from issuance of common stock upon private placement, net of issuance cost	32,108
Proceeds from issuance of common stock upon options exercises	39
Proceeds from issuance of common stock upon warrants exercises	7
Proceeds from issuance of preferred stock, net of issuance costs		7,201
Net cash provided by financing activities	32,154	7,201
Net increase in cash and cash equivalents	40,621	4,007
Cash and cash equivalents at beginning of period	4,778	777
Cash and cash equivalents at end of period	45,399	$ 4,784
Noncash activities:
Conversion of warrant liability to common stock upon private placement	1,050
Issuance of common stock in connection with a license agreement	3,172
Proceeds from issuance of common stock upon private placement, net of issuance cost	32,108
Non-cash net liabilities assumed in reverse merger	671
Conversion of convertible promissory note to common stock upon private placement	6,129
Conversion of preferred stock to common stock upon reverse merger	22,567
Eiccose LLC [Member]
Financing activities
Proceeds from issuance of common stock upon private placement, net of issuance cost	1,661
Noncash activities:
Proceeds from issuance of common stock upon private placement, net of issuance cost	$ 1,661