Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Allocated Stock-based Compensation Expense

The following table summarizes the components of stock-based compensation expense in the consolidated statements of operations for the years ended December 31, 2017 and 2016, respectively (in thousands):

	2017		2016
Research and development	$	729	$	23
General and administrative		2,440		331
Total stock-based compensation	$	3,169	$	354

Assumptions for Option Grants Issued

The Company uses the Black-Scholes option-pricing model and the following assumptions were used to determine the fair value of all its stock options granted in 2016:

Risk free interest rate	1.82-2.32%
Volatility	85-94%
Expected lives (years)	5.13-10.00
Expected dividend yield	0%

Stock Option Activity

The following table summarizes stock option activity of the Company:

	Total Number of Shares (In Thousands)			Weighted Average Exercise Price		Aggregate Intrinsic Value (In Thousands)
Balance as of January 1, 2016		—		$	—	$	—
Granted		55		$	52.94	$	—
Outstanding at December 31, 2016		55		$	52.94	$	—
Assumed in connection with the Merger with Galena		10			1,240.55	$	—
Canceled		(55	)		52.94	$	—
Outstanding at December 31, 2017		10		$	1,240.55	$	—
Options exercisable at December 31, 2017		10		$	1,240.55	$	—

RSU Activity for RSUs with Only Time-Based Conditions

The following table outlines RSU activity with only a time-based condition:

	Total Number of Shares (In Thousands)			Weighted Average Grant Date Fair Value
Outstanding at January 1, 2016		—		$	—
Granted		46		$	52.94
Outstanding at December 31, 2016		46		$	52.94
Granted		58		$	3.91
Vested		(46	)	$	52.94
Canceled		(58	)	$	3.91
Outstanding at December 31, 2017		—		$	—

RSU Activity for RSUs with Both Time-Based and Performance-Based Conditions

The liquidity event, as defined in the relevant RSU grant agreements, will be satisfied upon the earlier of either: a) change of control or b) a qualified initial public offering.

	Total Number of Shares (In Thousands)			Weighted Average Grant Date Fair Value
Outstanding at January 1, 2016		—		$	—
Granted		21		$	52.94
Outstanding at December 31, 2016		21		$	52.94
Vested		—			NA
Canceled		(8	)	$	52.94
Outstanding at December 31, 2017		13		$	52.94