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Equity - Summary of Stock Option Plans (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Equity [Abstract]
Number of Options, Outstanding at beginning balance	2,050,369	2,364,918
Number of Options, Granted at market price	91,500	65,000
Number of Options, Exercised
Number of Options, Forfeited or expired	(740,380)	(379,549)
Number of Options, Outstanding at end balance	1,401,489	2,050,369
Number of Options, Exercisable at end of period	1,393,155	2,004,534
Weighted Average Exercise Price, Outstanding at beginning balance	$ 3.62	$ 3.51
Weighted Average Exercise Price, Granted at market price	0.25	0.15
Weighted Average Exercise Price, Exercised
Weighted Average Exercise Price, Forfeited or expired	3.54	2.29
Weighted Average Exercise Price, Outstanding at end balance	3.45	3.62
Weighted Average Exercise Price, Exercisable at end of Period	$ 3.47	$ 3.69

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
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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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-Name Accounting Standards Codification
-Topic 718
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-Section 50
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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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Weighted average price of options that were either forfeited or expired.

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

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