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Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2019

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

Schedule of stock based compensation expense

Stock based compensation has been reported within expense line items on the consolidated statement of operations for the three and nine months ended September 30, 2018 and 2019 as shown in the following table (in $000s):

		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2018			2019			2018			2019
General and administrative		$	66			123		$	188			235
Research and development			22			61			67			126
Stock-based compensation costs before income taxes		$	88			184		$	255			361

Schedule of share option activity

A summary of the share option activity and related information is as follows:

							Weighted
				Weighted			Average
		Number of		Average			Remaining		Aggregate
		Options		Exercise			Contractual		Intrinsic
		Outstanding		Price Per Share			Term (Years)		Value ($000)
Options outstanding at December 31, 2018		831,611		$	6.68		8.13		$	—
Granted		1,550,270		$	0.71
Cancelled/forfeited		(115,864)		$	2.03
Options outstanding at September 30, 2019		2,266,017		$	2.84		8.66		$	—
Unvested at September 30, 2019		1,613,280		$	1.27		8.90		$	—
Vested and exercisable at September 30, 2019		652,737		$	6.71		8.08		$	—

Schedule of fair value of the stock options granted

The fair value of the stock options granted is calculated using the Black-Scholes option-pricing model as prescribed by ASC 718 using the following assumptions:

		Year Ended		Nine Months Ended
		December 31, 2018		September 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 allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
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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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