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10. Stock-Based Compensation (Details 1) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Options
Number of outstanding, ending	3,746	2,889
Weighted average exercise price outstanding, ending	$ 1.38	$ 1.80
Remaining contractual term (in years)	7 years 10 months 2 days	7 years 9 months 18 days
Average intrinsic value	$ 222	$ 0
Vested Options
Number of outstanding, ending	2,659	1,923
Weighted average exercise price outstanding, ending	$ 1.56	$ 2.01
Remaining contractual term (in years)	7 years 5 months 12 days	7 years 4 months 2 days
Average intrinsic value	$ 145	$ 0
Unvested Options
Number of outstanding, ending	1,087	966
Weighted average exercise price outstanding, ending	$ .93	$ 1.38
Remaining contractual term (in years)	8 years 9 months 11 days	8 years 9 months 22 days
Average intrinsic value	$ 77	$ 0

X

- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

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

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

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

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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