Represents the information pertaining to period for options fully exercisable from the grant date.

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Represents the information pertaining to maximum fair market value of incentive stock options vesting in a calendar year.

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Represents the information pertaining to percentage of fair market value for granting stock options for greater than 10% stockholders.

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Represents the information pertaining to minimum percentage of ownership for stockholders who were granted stock options with fair market value at 110%.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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- Definition

Number of warrants or rights outstanding.

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Percentage of vesting of share-based compensation awards.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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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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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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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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

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No definition available.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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

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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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Stockholders' equity (deficit) (Details) (USD $)	3 Months Ended		0 Months Ended	1 Months Ended
Stockholders' equity (deficit) (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Oct. 24, 2014	Mar. 31, 2014	Dec. 31, 2014
Warrant
Share-based Compensation Arrangement by Share-based Payment Award
Stock purchase warrants, outstanding (in shares)	258,605				33,594
Stock options
Share-based Compensation Arrangement by Share-based Payment Award
Stock options, granted (in shares)	826,500	0
Stock options, exercise price (in dollars per share)	$ 0.61
Stock options, weighted average grant date fair value	$ 4.21
Stock options, outstanding (in shares)	1,229,494
Allocated share-based compensation expense	$ 590,603	$ 28,927
Stock options \| Research and development
Share-based Compensation Arrangement by Share-based Payment Award
Allocated share-based compensation expense	36,456	6,094
Stock options \| General and administrative
Share-based Compensation Arrangement by Share-based Payment Award
Allocated share-based compensation expense	83,299	22,060
Stock options \| Sales and marketing activities
Share-based Compensation Arrangement by Share-based Payment Award
Allocated share-based compensation expense	470,848	773
Stock options \| 2002 plan
Share-based Compensation Arrangement by Share-based Payment Award
Number of options authorized under the plan (in shares)	3,036
Maximum fair market value of incentive stock options	$ 100,000
Percentage of fair market value for granting stock options (as a percent)	110.00%
Minimum percentage of stockholders granted stock options at fair market value (as a percent)	10.00%
Stock options, contractual terms (in years)	10 years
Stock options, vesting percentage (as a percent)	25.00%
Stock options, exercisable period (in years)	4 years
Stock options \| 2008 plan
Share-based Compensation Arrangement by Share-based Payment Award
Number of options authorized under the plan (in shares)	7,570
Number of shares available for grant under the plan (in shares)	217,992
Stock options, contractual terms (in years)	10 years
Stock options, vesting percentage (as a percent)	25.00%
Stock options, exercisable period (in years)	4 years
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award
Restricted stock units, awarded (in shares)				130,640
Restricted stock units, vested (in shares)			130,640