CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash	$ 11,231	$ 11,672
Other current assets	278	107
Total current assets	11,509	11,779
Deferred tax assets, net	9,282	11,111
Total assets	20,791	22,890
Current liabilities:
Accounts payable	0	90
Accrued expenses and other current liabilities	150	205
Accrued lease termination costs	0	4,506
Total current liabilities	150	4,801
Commitments and contingencies
Stockholders’ equity:
Preferred stock - $0.01 par value, authorized 3,000,000 shares; no shares issued and outstanding at June 30, 2016 and December 31, 2015	0	0
Common stock - $0.01 par value, authorized 170,000,000 shares; issued and outstanding 43,866,611 and 44,214,603 shares at June 30, 2016 and December 31, 2015, respectively	439	441
Additional paid-in capital	96,916	96,914
Accumulated deficit	(76,714)	(79,266)
Total stockholders’ equity	20,641	18,089
Total liabilities and stockholders’ equity	$ 20,791	$ 22,890