Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of Net Loss Before Income Taxes

Net loss before income taxes attributable to United States and international operations, consisted of the following:

	Year Ended December 31,
	2019			2018			2017
United States	$	(64,076	)	$	(70,176	)	$	(56,178	)
Foreign	(5,406		)	(9,254		)	(10,681		)
Net loss before income taxes	$	(69,482	)	$	(79,430	)	$	(66,859	)

Schedule of Income Tax Expense (Benefit)

Income tax expense (benefit) consisted of the following:

	Year Ended December 31,
	2019			2018			2017
Current:
Federal	$	—		$	—		$	(102	)
State	53			81			102
Foreign	172			260			237
Total current	225			341			237
Deferred:
Federal	(4,133		)	(27		)	(699		)
State	(819		)	(19		)	—
Foreign	2			(11		)	3
Total deferred	(4,950		)	(57		)	(696		)
Total:
Federal	(4,133		)	(27		)	(801		)
State	(766		)	62			102
Foreign	174			249			240
Income tax expense (benefit)	$	(4,725	)	$	284		$	(459	)

Schedule of Income Tax Expense (Benefit) Computation

Income tax expense (benefit) was computed by applying the United States federal statutory rate to net loss before income taxes as follows:

	Year Ended December 31,
	2019			2018			2017
Income tax benefit at federal statutory rate	$	(14,591	)	$	(16,680	)	$	(22,732	)
State income tax benefit, net of federal benefit	(1,160		)	(1,756		)	(1,114		)
Meals and entertainment	178			230			454
Research and development credits	(931		)	(1,211		)	(913		)
Stock-based compensation	1,825			2,016			3,203
163(l) limited interest expense	4,391			994			—
Contingent consideration	(357		)	(1,491		)	(986		)
Foreign tax rate differential	(269		)	(405		)	692
Net change in valuation allowance	2,899			16,360			(24,976		)
Return to provision	2,387			1,612			5,719
Unrecognized tax benefits	466			605			457
Federal tax rate change	—			—			39,807
NOL expiration and other, net	437			10			(70		)
Income tax expense (benefit)	$	(4,725	)	$	284		$	(459	)

Schedule of Components of Deferred Tax Assets and Liabilities

Significant components of the Company’s deferred tax assets (liabilities) were as follows:

	Year Ended December 31,
	2019			2018
Deferred tax assets:
Net operating loss carryforwards	$	114,124		$	110,130
Accrued expenses	3,647			3,757
Tax credits	13,054			12,540
Bad debt	240			104
Inventory	4,056			4,821
Capitalized research and development	20,161			17,931
Equity compensation	2,965			2,669
Operating lease liabilities	3,239			—
Interest expense	8,418			3,718
Other	873			1,174
Deferred tax asset	170,777			156,844
Valuation allowance	(139,855		)	(135,216		)
Total deferred tax assets	30,922			21,628
Deferred tax liabilities:
Developed technology and trademark	(8,842		)	(8,830		)
Trademarks and trade names	(826		)	(765		)
Depreciation and amortization	(6,924		)	(8,034		)
Convertible debt	(12,878		)	(4,149		)
Operating lease right-of-use assets	(1,372		)	—
Other	(230		)	—
Total deferred tax liabilities	(31,072		)	(21,778		)
Net deferred tax liability	$	(150	)	$	(150	)

Schedule of Reconciliation of Unrecognized Tax Benefits

The following is a tabular reconciliation of the total amounts of unrecognized tax benefits:

	Year Ended December 31,
	2019			2018
Balance at January 1	$	12,888		$	12,207
Additions for tax positions related to prior periods	—			—
Decreases related to prior year tax positions	(26		)	(17		)
Lapse of statute of limitations	—			—
Additions for tax positions related to current period	538			698
Balance at December 31	$	13,400		$	12,888