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Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

Disclosure Of Compensation Related Costs Share-Based Payments [Abstract]

Schedule of stock based compensation expense

		Three Months Ended June 30,								Six Months Ended June 30,
		2018				2019				2018				2019
General and administrative		$	63			$	57			$	122			$	112
Research and development			23				35				45				66
Stock-based compensation costs before income taxes		$	86			$	92			$	167			$	178

Schedule of share option activity

		Number of Options Outstanding				Weighted Average Exercise Price Per Share				Weighted Average Remaining Contractual Term (Years)				Aggregate Intrinsic Value ($000)
Options outstanding at December 31, 2018			831,611			$	6.68				8.13			$	—
Granted			1,550,270			$	0.71
Cancelled/forfeited			(39,613	)		$	2.76
Options outstanding at June 30, 2019			2,342,268			$	2.80				8.90			$	—
Unvested at June 30, 2019			(1,827,156	)		$	1.25				9.15			$	—
Vested and exercisable at June 30, 2019			515,112			$	8,28				8.02			$	—

Schedule of fair value of the stock options granted

​		Year ended  December 31, 2018				Six months ended  June 30, 2019
Expected term (years)			6				5 – 6
Risk free interest rate			2.730% – 2.855%				2.105 – 2.610%
Volatility			105% – 107%				103 – 110%
Expected dividend yield over expected term			0.00%				0.00%
Resulting weighted average grant date fair value			$1.25				$0.52 – $0.61

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Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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