Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2018

Summary of Significant Accounting Policies [Abstract]

Schedule of Estimated Future Amortization Expense

Fiscal Years Ending December 31,	Total Amortization
	(unaudited)
2018 (three months remaining)	$	13
2019		32
2020		9
2021		8
2022		8
Later years		24
	$	94

Summary of Activity Related to Warranty Liability Included in Other Current Liabilities

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
		(unaudited)				(unaudited)
Beginning balance	$	382	$	609	$	468	$	584
Warranty accruals and adjustments		39		19		20		135
Warranty claims		(35)		(39)		(102)		(130)
Ending balance	$	386	$	589	$	386	$	589

Schedule of Earnings Per Share, Basic and Diluted

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
	(unaudited)				(unaudited)
Net income (loss)	$	63	$	(2,992)	$	(7,083)	$	(7,261)
Income allocated to participating securities		9		—		—		—
Income (loss) allocated to common shares	$	54	$	(2,992)	$	(7,083)	$	(7,261)
Weighted average common shares outstanding   - Basic		45,149,717		34,972,589		44,182,379		33,214,262
Dilutive effect of stock options		115,653		—		—		—
Weighted average common shares outstanding   - Diluted		45,265,370		34,972,589		44,182,379		33,214,262
Net loss per share:
Basic	$	-	$	(0.09)	$	(0.16)	$	(0.22)
Diluted	$	-	$	(0.09)	$	(0.16)	$	(0.22)

Schedule of Potentially Dilutive Common Stock Equivalents

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2018	2017	2018	2017
	(unaudited)		(unaudited)
Options	4,843,468	5,142,448	4,959,120	5,142,448
Warrants	9,055,773	5,081,449	9,055,773	5,081,449
Convertible preferred stock	7,545,333	7,545,333	7,545,333	7,545,333
Total potentially dilutive common stock equivalents	21,444,574	17,769,230	21,560,226	17,769,230

Reconciliation of the Level 3 Warrant Liability Measured and Recorded at Fair Value on a Recurring Basis

	Estimated Fair Value
	(unaudited)
Balance as of January 1, 2018	$	784
Fair value of warrants issuance during period		2,906
Change in fair value of warrant liability, net		(387)
Balance as of September 30, 2018	$	3,303