Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Taxes [Abstract]

Summary Of Company's Provision for Income Taxes

	2020		2019		2018
Current Tax Expense
Federal	$	(26)	$	(26)	$	(51)
State		78		34		28
Foreign		74		165		198
Total current tax expense		126		173		175
Deferred Tax Expense
Federal	$	(10,304)	$	(7,655)	$	(3,048)
State		(1,686)		(1,368)		178
Foreign		(3,071)		(1,690)		45
Change in valuation allowance		15,049		10,739		2,876
Total deferred tax expense		(12)		26		51
Total tax expense	$	114	$	199	$	226

Summary of Detail of Deferred Tax Assets and Liabilities

	2020		2019
Deferred tax assets (liabilities):
Net operating loss carryforward	$	123,556	$	111,000
Research and development and AMT credit carryforwards, net		9,365		8,193
Deferred interest		1,598		909
Equity compensation		8,623		8,233
Accruals and reserves		3,739		3,513
Inventories		1,360		1,007
Intangible assets		(30,773)		(30,996)
Property and equipment, net		(1,315)		(1,482)
Finance and operating lease liabilities		3,164		4,016
Right-of-use assets		(2,547)		(3,476)
Other, net		293		287
Subtotal		117,063		101,204
Less valuation allowance		(117,025)		(101,178)
Total	$	38	$	26

Summary Of Difference Between Effective Income Tax Rates and Federal Statutory Rate

	2020				2019				2018
Federal tax at statutory rate	21.00	%	$	(10,088)	21.00	%	$	(6,950)	21.00	%	$	(4,391)
Federal and Foreign tax rate change	2.97			(1,425)	1.40			(462)	(6.84)			1,430
Federal R&D credit	2.05			(985)	2.53			(837)	4.39			(918)
Federal deferred adjustment	2.77			(1,328)	3.28			(1,085)	(10.77)			2,253
Valuation allowance	(31.33)			15,048	(32.45)			10,739	(13.75)			2,876
State income taxes	3.35			(1,607)	4.02			(1,334)	(0.99)			206
Foreign NOL rate change	0.92			(441)	(1.17)			388	(1.22)			256
Foreign tax rate differential	0.57			(274)	(0.38)			126	(0.60)			125
Permanent differences and other	(2.53)			1,214	1.17			(386)	7.70			(1,611)
Effective tax rate	(0.23)	%	$	114	(0.60)	%	$	199	(1.08)	%	$	226

Summary Of Reconciliation of Change in Federal and State Unrecognized Tax Benefits

	2020		2019		2018
Balance at the beginning of the year	$	1,777	$	1,157	$	1,157
Increases (decreases) for prior year tax positions		21		620		—
Increases (decreases) for current year tax positions		—		—		—
Increases (decreases) related to settlements		—		—		—
Decreases related to statute lapse		—		—		—
Balance at the end of the year	$	1,798	$	1,777	$	1,157