Annual report pursuant to Section 13 and 15(d)

Income Tax - Significant Components of Company's Deferred Tax Assets (Detail)

v3.3.1.900
Income Tax - Significant Components of Company's Deferred Tax Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]    
Tax basis in excess of book value of assets $ 6,308 $ 4,871
Non-capital loss carryforwards 77,746 76,403
Research and development deductions and credits 7,484 7,464
Stock options 3,448 3,163
Restructuring liability 474 (25)
Other 1,627 110
Total deferred tax assets 97,087 91,986
Valuation allowance $ (97,087) $ (91,986)