The number of common stock issued and outstanding pursuant to exercise of stock options.

No definition available.

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- Definition

The number of common stock issued and outstanding pursuant to restricted and unrestricted stock awards.

+ References

No definition available.

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- Definition

The annual increase in the number of shares available for issuance under the plan, represented as a percentage.

+ References

No definition available.

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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.

+ References

No definition available.

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- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

+ Details

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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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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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Common Stock, warrants, stock-based compensation, stock options, restricted stock and restricted stock units - Stock-based award plans (Details) - shares		3 Months Ended
	Jan. 01, 2019	Sep. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Common Stock, warrants, stock-based compensation, stock options, restricted stock and restricted stock units
Common stock available for future awards (in shares)				5,348,442	6,013,745
2007 Plan
Common Stock, warrants, stock-based compensation, stock options, restricted stock and restricted stock units
Shares authorized under the plan (in shares)		4,350,035			1,042,314	3,852,213	3,229,935
Additional shares authorized		497,822	622,227
Shares available for grant under the plan (in shares)				4,393	1,042,314
Annual increase in the shares available for grant under the plan (as a percent of shares of common stock outstanding)				4.00%
2017 Plan
Common Stock, warrants, stock-based compensation, stock options, restricted stock and restricted stock units
Additional shares authorized	895,169
2017 ESPP
Common Stock, warrants, stock-based compensation, stock options, restricted stock and restricted stock units
Shares authorized under the plan (in shares)					208,463
Shares available for grant under the plan (in shares)				425,533
Annual increase in the shares available for grant under the plan (as a percent of shares of common stock outstanding)					1.00%
Outstanding stock options
Common Stock, warrants, stock-based compensation, stock options, restricted stock and restricted stock units
Options outstanding (in shares)				2,476,911	2,249,843		1,119,671
Outstanding stock options \| 2007 Plan
Common Stock, warrants, stock-based compensation, stock options, restricted stock and restricted stock units
Options outstanding (in shares)					2,249,843
Common stock issued and outstanding pursuant to the exercise of options (in shares)					571,838
Common stock available for future awards (in shares)					399,379
Shares authorized under the plan (in shares)					2,490,290
Restricted and unrestricted stock awards \| 2007 Plan
Common Stock, warrants, stock-based compensation, stock options, restricted stock and restricted stock units
Common stock issued and outstanding pursuant to restricted or unrestricted stock awards (in shares)					1,128,975