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Stockholders' Equity - Company's Stock Option Activity Summary (Details) - $ / shares		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019
Number of Options
Outstanding at January 1, 2018		3,257,875
Granted		4,263,000
Exercised		(7,500)
Expired/Forfeited		(290,750)
Outstanding at December 31, and expected to vest	3,257,875	7,222,625
Exercisable at December 31, 2018		2,671,125
Weighted Average Exercise Price
Outstanding at January 1, 2018		$ 5.44
Granted		1.84
Exercised		1.73
Expired/Forfeited		5.08
Outstanding at December 31, and expected to vest	$ 5.44	3.33
Exercisable at December 31, 2018		$ 5.11
Weighted Average Remaining Contractual Life (in Years)	3 years 2 months 9 days	5 years 9 months 26 days
Exercisable Weighted Average Remaining Contractual Life (in Years)		1 year 11 months 12 days

X

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Weighted average price of options that were either forfeited or expired.

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- Definition

Gross number of share options (or share units) granted during the period.

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

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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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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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Number of share options (or share units) exercised during the current period.

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