Number of shares issued due to stock plan related activity.

No definition available.

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- Definition

Value of shares issued due to stock plan related activity.

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No definition available.

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- Definition

This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

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- Definition

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

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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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- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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- Definition

Number of shares issued during the period as a result of the conversion of convertible securities.

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- Definition

Number of new stock issued during the period.

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- Definition

Number of share options (or share units) exercised during the current period.

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- Definition

The gross value of stock issued during the period upon the conversion of convertible securities.

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- Definition

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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- Definition

Value of stock issued as a result of the exercise of stock options.

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Amount of decrease of par value, additional paid in capital (APIC) and retained earnings of common and preferred stock retired from treasury when treasury stock is accounted for under the par value method.

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Number of shares of common and preferred stock retired from treasury during the period.

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Consolidated Statements of Stockholders' Equity (Deficit) (USD $) In Thousands, except Share data	Total	Series A-1 Convertible Preferred Stock [Member]	Series A-2 Convertible Preferred Stock [Member]	Series B Convertible Preferred Stock [Member]	Series C Convertible Preferred Stock [Member]	Series D-1 Convertible Preferred Stock [Member]	Series D-2 Convertible Preferred Stock [Member]	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2011	$ (17,484)us-gaap_StockholdersEquity	$ 269	$ 74	$ 714	$ 1,110	$ 144	$ 637	$ 10	$ (58)	$ 163,450	$ (183,834)
Beginning Balance, Shares at Dec. 31, 2011		26,874,792	7,364,582	71,401,237	110,952,217	14,446,227	63,681,176	1,049,030	14,381
Share-based compensation	838									838
Stock option exercises	46									46
Stock option exercises, Shares	863,176							49,884
Net income (loss)	8,362us-gaap_NetIncomeLoss										8,362
Ending Balance at Dec. 31, 2012	(8,238)us-gaap_StockholdersEquity	269	74	714	1,110	144	637	10	(58)	164,334	(175,472)
Ending Balance, Shares at Dec. 31, 2012		26,874,792	7,364,582	71,401,237	110,952,217	14,446,227	63,681,176	1,098,914	14,381
Share-based compensation	862									862
Issuance of common stock, net of offering costs	83,623							58		83,565
Issuance of common stock, net of offering costs, Shares								5,750,000
Conversion of preferred stock to common stock	1,860	(269)	(74)	(714)	(1,110)	(144)	(637)	171		4,637
Conversion of preferred stock to common stock, Shares		(26,874,792)	(7,364,582)	(71,401,237)	(110,952,217)	(14,446,227)	(63,681,176)	17,060,634
Stock option exercises	1,068							13		1,055
Stock option exercises, Shares	1,268,049							1,268,049
Net income (loss)	(261)us-gaap_NetIncomeLoss										(261)
Ending Balance at Dec. 31, 2013	78,914us-gaap_StockholdersEquity							252	(58)	254,453	(175,733)
Ending Balance, Shares at Dec. 31, 2013								25,177,597	14,381
Share-based compensation	3,244									3,244
Issuance of common stock, net of offering costs	76,716							22		76,694
Issuance of common stock, net of offering costs, Shares								2,250,000
Stock plan related activity, value of shares issued	725							6	(19)	738
Stock plan related activity, shares issued								568,041	865
Retirement of treasury stock									58	(58)
Stock option exercises, Shares	568,906
Retirement of treasury stock, Shares									(14,381)
Net income (loss)	(38,313)us-gaap_NetIncomeLoss										(38,313)
Ending Balance at Dec. 31, 2014	$ 121,286us-gaap_StockholdersEquity							$ 280	$ (19)	$ 335,071	$ (214,046)
Ending Balance, Shares at Dec. 31, 2014								27,995,638	865