Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details)

v3.20.1
Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
Net operating loss carryforwards $ 50,802,000 $ 38,761,000  
General business credit carryforwards 3,939,000 3,214,000  
State credits 2,934,000 3,012,000  
Property, equipment and goodwill (28,000) (72,000)  
Stock options 7,960,000 6,316,000  
Derivatives (57,000)  
Deferred revenue 62,000 62,000  
Intangible assets 1,625,000 399,000  
Other 28,000 80,000  
Gross deferred tax assets 67,322,000 51,715,000  
Valuation allowance (67,322,000) (51,715,000)  
Net deferred taxes $ 34,400,000