Subsequent Events	6 Months Ended
Jun. 30, 2012
Subsequent Events [Abstract]
Subsequent Events	9. Subsequent Events 2012 Equity Incentive Plan The Company’s board of directors adopted the 2012 Equity Incentive Plan in July 2012. The 2012 Equity Incentive Plan went into effect and the 2001 Stock Plan was terminated in August 2012. However, the awards under the 2001 Stock Plan outstanding as of and subsequent to the termination of the 2001 Plan will continue to be governed by their existing terms. Under the Company’s 2012 Equity Incentive Plan, the aggregate number of common shares issued shall not exceed the sum of (a) 4,000,000 common shares, (b) the number of common shares reserved under the 2001 Stock Plan that are not issued or subject to outstanding awards under the 2001 Stock Plan upon its termination, (c) any common shares subject to outstanding options under the 2001 Stock Plan upon its termination that subsequently expire or lapse unexercised and common shares issued pursuant to awards granted under the 2001 Stock Plan that are outstanding upon its termination and that are subsequently forfeited to or repurchased by the Company; provided, however, that no more than 3,800,000 common shares, in the aggregate, shall be added to the 2012 Equity Incentive Plan pursuant to clauses (b) and (c). In addition, the number of shares reserved for issuance under the 2012 Equity Incentive Plan will be increased automatically on the first business day of each fiscal year of the Company, starting with fiscal year 2013 and ending in fiscal year 2022, by a number equal to the lesser of (a) 5% of the total number of common shares outstanding on December 31 of the prior year, (b) 3,000,000 common shares, subject to certain adjustments in accordance with the 2012 Equity Incentive Plan, or (c) a number of common shares determined by the Company’s board of directors. As of August 31, 2012, 7,256,227 shares of common stock were reserved for issuance under the 2012 Equity Incentive Plan. The number of common shares that are subject to stock awards outstanding at any time under the 2012 Equity Incentive Plan may not exceed the number of common shares that then remain available for issuance under the 2012 Equity Incentive Plan. Under the 2012 Equity Incentive Plan, the Company may grant shares, stock units, stock appreciation rights, performance cash awards and/or options to employees, directors, consultants, and other service providers. For options, the per share exercise price may not be less than the fair market value of a Company common share on the date of grant. Awards generally vest over four years and expire 10 years from the date of grant. Options generally become exercisable as they vest following the date of grant. Loan and Security Agreement In September 2012, the Company entered into a loan and security agreement (the Agreement) with MidCap Financial, SBIC, LP (MidCap Financial), providing for the borrowing of up to $15 million, of which $10 million is required to be drawn. The remaining $5 million may be drawn at the option of the Company. The Agreement provides for the loan to be issued in three tranches, the first tranche of $5 million was issued in September 2012, the second tranche of $5 million must be issued no later than June 2013 and the final tranche may be drawn at the option of the Company no later than June 2013. The loan has an annual interest rate of one month LIBOR plus 600 basis points, subject to a LIBOR floor of 3%. Interest on amounts outstanding are payable monthly in arrears. There is an interest only period to December 31, 2013 followed by straight-line principal payments over thirty-six months. At the time of final payment, the Company must pay an exit fee of 3% of the drawn amount. Pursuant to the Agreement, the Company provided a first priority security interest in all existing and after-acquired assets, excluding intellectual property. In addition, the terms of the Agreement provide MidCap Financial a warrant to purchase shares of Series E Preferred stock equal to 4% of the amount drawn under the facility divided by the Series E convertible preferred stock exercise price of $3.40. The warrant is exercisable for up to 10 years from the date of issuance and will expire upon the completion of an initial public offering of the Company’s common stock if it has not been previously exercised.

Subsequent Events

6 Months Ended

Jun. 30, 2012

9. Subsequent Events

2012 Equity Incentive Plan

The Company’s board of directors adopted the 2012 Equity Incentive Plan in July 2012. The 2012 Equity Incentive Plan went into effect and the 2001 Stock Plan was terminated in August 2012. However, the awards under the 2001 Stock Plan outstanding as of and subsequent to the termination of the 2001 Plan will continue to be governed by their existing terms.

Under the Company’s 2012 Equity Incentive Plan, the aggregate number of common shares issued shall not exceed the sum of (a) 4,000,000 common shares, (b) the number of common shares reserved under the 2001 Stock Plan that are not issued or subject to outstanding awards under the 2001 Stock Plan upon its termination, (c) any common shares subject to outstanding options under the 2001 Stock Plan upon its termination that subsequently expire or lapse unexercised and common shares issued pursuant to awards granted under the 2001 Stock Plan that are outstanding upon its termination and that are subsequently forfeited to or repurchased by the Company; provided, however, that no more than 3,800,000 common shares, in the aggregate, shall be added to the 2012 Equity Incentive Plan pursuant to clauses (b) and (c). In addition, the number of shares reserved for issuance under the 2012 Equity Incentive Plan will be increased automatically on the first business day of each fiscal year of the Company, starting with fiscal year 2013 and ending in fiscal year 2022, by a number equal to the lesser of (a) 5% of the total number of common shares outstanding on December 31 of the prior year, (b) 3,000,000 common shares, subject to certain adjustments in accordance with the 2012 Equity Incentive Plan, or (c) a number of common shares determined by the Company’s board of directors.

As of August 31, 2012, 7,256,227 shares of common stock were reserved for issuance under the 2012 Equity Incentive Plan. The number of common shares that are subject to stock awards outstanding at any time under the 2012 Equity Incentive Plan may not exceed the number of common shares that then remain available for issuance under the 2012 Equity Incentive Plan.

Under the 2012 Equity Incentive Plan, the Company may grant shares, stock units, stock appreciation rights, performance cash awards and/or options to employees, directors, consultants, and other service providers. For options, the per share exercise price may not be less than the fair market value of a Company common share on the date of grant. Awards generally vest over four years and expire 10 years from the date of grant. Options generally become exercisable as they vest following the date of grant.

Loan and Security Agreement

In September 2012, the Company entered into a loan and security agreement (the Agreement) with MidCap Financial, SBIC, LP (MidCap Financial), providing for the borrowing of up to $15 million, of which $10 million is required to be drawn. The remaining $5 million may be drawn at the option of the Company. The Agreement provides for the loan to be issued in three tranches, the first tranche of $5 million was issued in September 2012, the second tranche of $5 million must be issued no later than June 2013 and the final tranche may be drawn at the option of the Company no later than June 2013. The loan has an annual interest rate of one month LIBOR plus 600 basis points, subject to a LIBOR floor of 3%. Interest on amounts outstanding are payable monthly in arrears. There is an interest only period to December 31, 2013 followed by straight-line principal payments over thirty-six months. At the time of final payment, the Company must pay an exit fee of 3% of the drawn amount. Pursuant to the Agreement, the Company provided a first priority security interest in all existing and after-acquired assets, excluding intellectual property. In addition, the terms of the Agreement provide MidCap Financial a warrant to purchase shares of Series E Preferred stock equal to 4% of the amount drawn under the facility divided by the Series E convertible preferred stock exercise price of $3.40. The warrant is exercisable for up to 10 years from the date of issuance and will expire upon the completion of an initial public offering of the Company’s common stock if it has not been previously exercised.