Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Taxes

Schedule of differences between the carrying amount of assets and liabilities for financial reporting purposes and their respective income tax basis

December 31	2019		2018		2017
Deferred tax assets:
Net operating loss carryforwards	$	36,250	$	30,588	$	27,578
Inventory write down		317		273		206
Depreciation		136		117		—
Amortization		—		—		23
Interest limitation		—		336		—
Allowance for doubtful accounts		274		285		117
Right-of-use liability		837		—		—
Stock-based compensation		3,140		2,335		520
Total deferred tax assets		40,954		33,934		28,444
Deferred tax liabilities:
Depreciation		—		—		(81)
Amortization		(206)		(43)		—
Right-of-use asset		(809)		—		—
Contract liabilities		(7)		(15)		(6)
Net deferred tax assets		39,932		33,876		28,357
Valuation allowance	$	(39,932)	$	(33,876)	$	(28,357)

Schedule of effective income tax rate differs from the statutory federal income tax rate

	Year Ended December 31,
		2019		2018
Federal tax rate		21.0	%	21.0	%
State Taxes - Net of Federal Benefit		4.1		4.1
Permanent items and other deductions		(4.3)		(0.5)
Valuation allowance		(20.8)		(24.6)
Effective income tax rate		—	%	—	%