The Company (Tables)

12 Months Ended

Dec. 31, 2017

The Company [Abstract]

Fair Value Measurements on Recurring Basis

The Company's recurring fair value measurements at December 31, 2017 and 2016 are as follows:

	Fair Value as of December 31, 2017		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Liabilities:
Warrant liability (Note 11)	$	3	$	-	$	-	$	3
	Fair Value as of December 31, 2016		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Liabilities:
Warrant liability (Note 11)	$	105	$	-	$	-	$	105

Accrued Warranty Costs Activity

The activity in the warranty accrual during the years ended December 31, 2017 and 2016 is summarized as follows:

	December 31,
	2017			2016
Accrual at beginning of year	$	115		$	226
Additions charged to warranty expense		161			196
Expiring warranties/claimed satisfied		(98	)		(307	)
Total		178			115
Less: current portion		(109	)		(102	)
Total long-term accrued warranty costs	$	69		$	13

Calculation of Basic and Diluted Net Loss Per Share by Class of Security

The following table presents the calculation of basic and diluted net loss per share by each class of security for the year ended December 31, 2017:

	Year ended December 31, 2017
	Common stock	Series C Preferred stock
Net loss	($ 7,747)	($ 11,084)
Weighted average number of shares outstanding during the period	2,713,782	10,444
Basic and Diluted net loss per share	($ 2.85)	($ 1,061.25)

Diluted Earnings Per Common Share Calculated Using Net Loss and Weighted Average Shares Outstanding

Diluted earnings per common share were calculated using the following net loss and weighted average shares outstanding for the year ended December 31, 2016:

	Year Ended December 31, 2016
Net loss	($ 3,335)
Gain on the change in fair value of the warrant liability	(5,396)
Diluted loss	($ 8,731)
Weighted average number of common and common equivalent shares outstanding:
Basic number of common shares outstanding	2,119,014
Dilutive effect of warrants	196,701
Diluted number of common and common stock equivalent shares outstanding	2,315,715

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The weighted average of potential common stock equivalents outstanding during the years ended December 31, 2017 and 2016 consist of common stock equivalents of common stock purchase warrants, senior secured convertible debentures, convertible preferred stock and common stock options, which are summarized as follows:

		Year Ended December 31,
	2017		2016
Common stock equivalents of convertible debentures	6,622,821		9,231,570
Common stock purchase warrants	2,406,625		3,739,037
Common stock equivalents of convertible Preferred B stock	289,462		496,824
Common stock options	876,373		613,773
Total	10,195,281		14,081,204