Annual report pursuant to Section 13 and 15(d)

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

v3.20.4
Income Tax - Significant Components of Company's Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets    
Tax basis in excess of book value of assets $ 892 $ 891
Non-capital loss carryforwards 35,596 33,166
Research and development deductions and credits 7,010 6,256
Stock options 466 315
§59(e) Capitalized R&D expenses 3,757 3,501
Accrued expenses 164 79
Other 183 181
Total deferred tax assets 48,068 44,389
Valuation allowance (47,539) (43,875)
Net deferred assets 529 514
Deferred tax liabilities    
Right of use assets (135) (79)
Other (394) (435)
Total deferred tax liabilities (529) $ (514)
Net deferred tax assets $ 0