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Common Stock Warrants, Shares

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Initial Reserve Or Shares, Percent Increase Each Year

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Term Of Agreement In Months

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weighted average estimated fair value of restricted stock

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Exercise price per share or per unit of warrants or rights outstanding.

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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Price of a single share of a number of saleable stocks of a company.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

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Number of shares issued which are neither cancelled nor held in the treasury.

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Number of new stock issued during the period.

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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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Aggregate value of stock related to Restricted Stock Awards issued during the period.

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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Stockholders' Equity (Details)			1 Months Ended	12 Months Ended
Stockholders' Equity (Details)	Jul. 28, 2016	Mar. 10, 2016 USD ($) $ / shares shares	Nov. 30, 2015	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 shares	Oct. 06, 2014 shares	Oct. 03, 2013 shares	Dec. 31, 2012 shares	Oct. 10, 2012 shares	Oct. 14, 2011 shares	Jan. 18, 2011 shares	Jun. 02, 2010 shares	Oct. 29, 2009 shares	May 09, 2009 shares
Class of Stock [Line Items]
Stock Split, Conversion Ratio	0.1
Common stock, par value (USD per share) \| $ / shares				$ 0.001	$ 0.001
Common stock, shares, issued (shares)		141,844		9,483,911	8,205,790
Common Stock Warrants, Shares		141,844			388,062
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares		$ 10.00
Share Price \| $ / shares		$ 7.05
Proceeds from Issuance of Warrants \| $		$ 1,000,000
Common stock, shares authorized (shares)				500,000,000	500,000,000
Stock Issued During Period, Shares, Restricted Stock Award, Gross				181,908	126,849
Stock Issued During Period, Value, Restricted Stock Award, Gross \| $				$ 627,700	$ 698,100
Common Stock [Member]
Class of Stock [Line Items]
Shares, Outstanding				9,483,911	8,205,790	5,673,302
Stock Issued During Period, Shares, New Issues				1,219,741	2,418,144
Aspire Capital Purchase Agreement [Member]
Class of Stock [Line Items]
Shares, Issued				319,776
Term Of Agreement In Months			24 months
Minimum [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				1 year
Common Stock [Member]
Class of Stock [Line Items]
Common stock, par value (USD per share) \| $ / shares				$ 0.001
ESPP [Member]
Class of Stock [Line Items]
Number of shares authorized under the plan				100,000					50,000
Shares, Issued				21,924
Shares, Outstanding				32,530
Non US Equity Plan [Member] \| Stock Options [Member]
Class of Stock [Line Items]
Common stock, shares authorized (shares)										57,000
2009 Equity Plan [Member] \| Stock Options [Member]
Class of Stock [Line Items]
Common stock, shares authorized (shares)							899,500	599,500		45,000	237,500	177,500	137,500	97,500	38,000
US Equity Plan [Member] \| 2015 Equity Plan [Member] \| Stock Options [Member] \| 2015 Equity Plan [Member]
Class of Stock [Line Items]
Common stock, shares authorized (shares)				440,000
Common Stock, Shares Authorized, Period for Automatic Increase				10 years
Initial Reserve Or Shares, Percent Increase Each Year				4.00%
Initial Reserve, Increase In Number Of Shares Each Year				17,600
US Equity Plan [Member] \| 2009 Equity Plan [Member] \| Stock Options [Member] \| 2009 Equity Plan [Member]
Class of Stock [Line Items]
Common stock, shares authorized (shares)				899,500
Share-based Compensation Award, Tranche One [Member] \| Stock Options [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period				2 years
Share-based Compensation Award, Tranche Two [Member] \| Stock Options [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period				3 years
Share-based Compensation Award, Tranche Three [Member] \| Stock Options [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period				10 years
Restricted Stock [Member]
Class of Stock [Line Items]
weighted average estimated fair value of restricted stock \| $ / shares				$ 3.45	$ 5.50
Restricted Stock [Member] \| Maximum [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				4 years