Common Stock Warrants, Shares

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- Definition

Term Of Agreement In Months

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- Definition

weighted average estimated fair value of restricted stock

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No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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- Definition

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).

+ References

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- Definition

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.

+ References

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-Publisher FASB
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- Definition

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.

+ References

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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.

+ References

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

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- Definition

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

+ References

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- Definition

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

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Stockholders' Equity (Details) - USD ($)	1 Months Ended	12 Months Ended
Stockholders' Equity (Details) - USD ($)	Nov. 30, 2015	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018	Jan. 01, 2013
Class of Stock [Line Items]
Common Stock Warrants, Shares			209,818
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
ESPP [Member]
Class of Stock [Line Items]
Number of shares authorized under the plan			100,000	500,000	50,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans		26,875
Shares, Outstanding		405,655
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		$ 3.79	$ 3.45
Stock Issued During Period, Shares, Restricted Stock Award, Gross		91,740	181,908
Stock Issued During Period, Value, Restricted Stock Award, Gross		$ 347,700	$ 627,700
Restricted Stock [Member] \| Maximum [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		4 years