Annual report pursuant to Section 13 and 15(d)

Income Taxes - Significant Components of Company's Deferred Taxes Consist (Detail)

v3.8.0.1
Income Taxes - Significant Components of Company's Deferred Taxes Consist (Detail) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Deferred tax assets:    
Net operating loss carryforwards $ 71,616 $ 76,486
Amortization of license fees 13,648 7,277
Amortization of in-process R&D 557 742
Stock compensation 10,682 10,899
Accruals and reserves 5,166 4,025
Tax credits 7,376 6,305
Start up costs 75 98
Unrealized loss on investments 0 1,095
Total deferred tax assets 109,120 106,927
Less: valuation allowance (101,645) (94,687)
Net deferred tax assets 7,475 12,240
Deferred tax liabilities:    
Unrealized gain/loss on investment (685) 0
Intangibles (3,321) (4,450)
Basis in subsidiary (3,469) (7,790)
Total deferred tax assets, net $ 0 $ 0