Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of Anti-dilutive Securities Excluded from Computation of Diluted Weighted Average Shares Outstanding

the following potentially dilutive securities have been excluded from the computation of diluted weighted average shares outstanding as of December 31, 2019, 2018, and 2017, as they would be anti-dilutive:

	Year Ended
	2019		2018		2017
Warrants		1,400		2,900		4,351
Stock options		27,164		18,614		14,367
Nonvested shares		2,120		2,214		1,314
Series A-1 convertible preferred stock		333		333		333
Series C-1 convertible preferred stock		12,459		18,459		-

Topic 842 Disclosure of Impact of Adoption to Condensed Consolidated Financial Statements

We recorded the following adjustments to our condensed consolidated balance sheet on the date of adoption (in thousands):

	As Reported December 31, 2018			ASC 842 Adjustment			Adjusted January 1, 2019
Condensed Consolidated Balance Sheet Data:
Operating lease right-of-use assets	$	—		$	5,687		$	5,687
Current portion, operating lease liabilities		—			1,510			1,510
Other current liabilities		484			(95	)		389
Operating lease liabilities, net of current portion		—			6,216			6,216
Other long-term liabilities		2,773			(1,921	)		852
Accumulated deficit	$	(1,177,311	)	$	(25	)	$	(1,177,336	)