4. RESTRUCTURING

With projected reduced operational demands as a result of the Collaboration Agreement with Janssen, on March 3, 2015, we announced an organizational resizing to reduce our workforce from 39 to 21 positions. For the three and six months ended June 30, 2015, we recognized $941,000 and $1,347,000 in restructuring charges, respectively, for the pro-rata portion of the one-time termination benefits. These charges included $212,000 and $302,000 of non-cash stock-based compensation expense for the three and six months ended June 30, 2015, respectively, relating to the extension of the post-termination exercise period for certain stock options previously granted to employees affected by the restructuring from 90 days to one year from their respective termination dates. For the year ended December 31, 2015, we recorded restructuring charges of approximately $1,306,000, net of non-cash adjustments, related to one-time termination benefits which were recognized on a pro-rata basis commencing from the date of announcement of the resizing over the specified remaining service periods for the employees affected by the restructuring. All actions associated with this restructuring were completed in 2015, and we do not anticipate incurring any further charges in connection with this restructuring. We expect this restructuring to result in aggregate cash expenditures of approximately $999,000, of which $980,000 has been paid as of June 30, 2016.

The components of the outstanding restructuring liability, which is included in accrued restructuring charges on our condensed balance sheet as of June 30, 2016, are summarized in the following table:

(In thousands)	Employee Severance and Other Benefits
Beginning accrual balance as of December 31, 2015	$	52
Cash payments	(33		)

Ending accrual balance as of June 30, 2016	$	19