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Equity - Summary of Stock Option Activity (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($) $ / shares shares
Equity [Abstract]
Number of Options (in shares), Outstanding at beginning balance | shares	1,466,489
Number of Options (in shares), Granted | shares	227,500
Number of Options (in shares), Exercised | shares
Number of Options (in shares), Forfeited or Expired | shares	(104,834)
Number of Options (in shares), Outstanding at end balance | shares	1,589,155
Number of Options (in shares), Exercisable at end of period | shares	1,333,155
Weighted Average Exercise Price Per Share, Outstanding at beginning balance | $ / shares	$ 3.01
Weighted Average Exercise Price Per Share, Granted | $ / shares	0.31
Weighted Average Exercise Price Per Share, Exercised | $ / shares
Weighted Average Exercise Price Per Share, Forfeited or Expired | $ / shares	7.33
Weighted Average Exercise Price Per Share, Outstanding at end balance | $ / shares	2.34
Weighted Average Exercise Price Per Share, Exercisable at end of period | $ / shares	$ 2.73
Weighted Average Remaining Contractual Life, Outstanding	1 year 10 months 17 days
Weighted Average Remaining Contractual Life, Outstanding	2 years 2 months 12 days
Weighted Average Remaining Contractual Life, Exercisable	1 year 4 months 24 days
Aggregate Intrinsic Value, Outstanding at beginning balance | $	$ 13
Aggregate Intrinsic Value, Outstanding at end balance | $	21
Aggregate Intrinsic Value, Exercisable | $	$ 21

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Weighted average remaining contractual life, outstanding.

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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.

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

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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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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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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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