Net Loss Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Basic and diluted net loss per common share calculation:
Net loss	$ (5,725)	$ (5,169)
Net loss attributable to common stockholders	$ (5,725)	$ (5,169)
Weighted average common shares outstanding (in shares)	96,332,324	88,897,292
Net loss per share of common stock, basic and diluted (in dollars per share)	$ (0.06)	$ (0.06)
Outstanding securities excluded from computation of diluted weighted shares outstanding (in shares)	11,290,706	8,902,210
Employee Stock Option
Basic and diluted net loss per common share calculation:
Outstanding securities excluded from computation of diluted weighted shares outstanding (in shares)	7,590,430	7,039,119
Restricted Stock Units
Basic and diluted net loss per common share calculation:
Outstanding securities excluded from computation of diluted weighted shares outstanding (in shares)	3,077,185	1,240,000
Warrants
Basic and diluted net loss per common share calculation:
Outstanding securities excluded from computation of diluted weighted shares outstanding (in shares)	623,091	623,091

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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