Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Stock-based Compensation

Schedule of stock-based compensation expense

	Year Ended
	December 31,
	2019		2018
Selling and marketing	$	151	$	269
General and administrative		2,115		2,655
Research and development		45		174
Total	$	2,311	$	3,098

Summary of assumptions used to estimate grant date fair value of stock options granted

Risk-free interest rate	2.85%
Expected term (in years)	6.25
Expected dividend yield	0%
Expected volatility	121.52%

2003 Stock Incentive Plan, as amended and restated

Stock-based Compensation

Summary of Stock Option Activity

				Weighted
		Weighted		Average
		Average		Remaining
		Exercise Price		Contractual
	Shares	Per Share		Life (years)
Outstanding at December 31, 2017	12	$	6,448,015.13
Shares reserved	—		—
Options granted	16		164,566.19
Options exercised	—		—
Options cancelled	—		—
Outstanding at December 31, 2018	28		2,957,210.16
Options granted	—		—
Options exercised	—		—
Options cancelled	—		—
Outstanding at December 31, 2019	28		2,957,210.16	7.6
Exercisable at December 31, 2019	17		4,579,286.97	7.6
Vested and expected to vest at December 31, 2019	28		2,957,210.16	7.9

Inducement grants

Stock-based Compensation

Summary of Stock Option Activity

				Weighted
		Weighted		Average
		Average		Remaining
		Exercise Price		Contractual
	Shares	Per Share		Life (years)
Outstanding at December 31, 2017	8	$	651,710.83
Options granted	10		113,808.24
Options exercised	—		—
Options cancelled	—		—
Outstanding at December 31, 2018	18		352,876.06
Options granted	—		—
Options exercised	—		—
Options cancelled	—		—
Outstanding at December 31, 2019	18		352,876.06	8.1
Exercisable at December 31, 2019	18		352,876.06	8.1
Vested and expected to vest at December 31, 2019	18		352,876.06	8.1