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Stockholders' Equity Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Stockholders' Equity Note [Abstract]

Summary of Impact of Results of Stock-Based Compensation

			For the year ended December 31,
			2020						2019
Cost of sales			$	2					$	9
Product development			10						26
Selling, general, and administrative			119						581
Total stock-based compensation			$	131					$	616

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions

Estimates utilized in the calculation include the expected life of the option, risk-free interest rate, and expected volatility, and are further comparatively detailed as follows: 

			2020						2019
Fair value of options issued			$	2.06					$	1.45
Exercise price			$	2.68					$	2.20
Expected life of option (in years)			6.1						4.8
Risk-free interest rate			0.7		%				1.8		%
Expected volatility			93.6		%				90.0		%
Dividend yield			0.00		%				0.00		%

Summary of Option Activity

A summary of option activity under all plans was as follows:

			Number of Options						Weighted Average Exercise Price Per Share
Outstanding at December 31, 2018			58,574						$	18.90
Granted			137,860						2.20
Cancelled			(35,499)						12.75
Expired			(5,505)						26.65
Outstanding at December 31, 2019			155,031						$	5.23
Granted			112,350						2.68
Cancelled			(33,774)						9.56
Exercised			(12,157)						2.11
Outstanding at December 31, 2020			221,450						$	3.45
Vested and expected to vest at December 31, 2020			177,827						$	3.62
Exercisable at December 31, 2020			38,465						$	7.88

Schedule of Options Outstanding

The options outstanding at December 31, 2020 have been segregated into ranges for additional disclosure as follows: 

OPTIONS OUTSTANDING																														OPTIONS EXERCISABLE
Range of Exercise Prices												Number of Shares Outstanding						Weighted Average Remaining Contractual Life (in years)						Weighted Average Exercise Price						Number of Shares Exercisable						Weighted Average Remaining Contractual Life (in years)						Weighted Average Exercise Price
$1.45			—			$1.48						27,525						9.2						$	1.45					425						9.2						$	1.45
$1.49			—			$1.68						50,000						9.2						1.50						—						9.2						1.50
$1.69			—			$2.25						80,975						8.6						2.10						21,250						8.5						2.10
$2.26			—			$5.79						31,380						8.8						2.55						7,420						8.7						2.40
$5.80			—			$53.50						31,570						8.1						12.64						9,370						4.3						25.61
												221,450						8.8						$	3.45					38,465						7.6						$	7.88

Summary of Restricted Stock Activity

The following table shows a summary of restricted stock unit activity: 

									Restricted Stock Units Outstanding						Weighted Average Grant Date Fair Value
At December 31, 2018									109,371						$	12.70
Granted									17,115						3.10
Vested									(87,256)						11.15
Forfeited									(32,627)						11.65
At December 31, 2019									6,603						$	13.17
Granted									19,200						2.44
Vested									(20,068)						3.96
Forfeited									(1,255)						12.40
At December 31, 2020									4,480						$	8.64

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