Select Condensed Consolidated Balance Sheets Details (Tables)

6 Months Ended

Jun. 30, 2021

Balance Sheet Related Disclosures [Abstract]

Accounts receivable, net

Accounts receivable, net consist of the following (in thousands):

	June 30, 2021			December 31, 2020
Accounts receivable	$	34,064		$	23,887
Allowance for doubtful accounts		(321	)		(360	)
Accounts receivable, net	$	33,743		$	23,527

Inventories, net

Inventories, net consist of the following (in thousands):

	June 30, 2021			December 31, 2020
Raw materials	$	10,439		$	6,064
Work-in-process		2,333			1,982
Finished goods		107,360			67,892
		120,132			75,938
Less reserve for excess and obsolete finished goods		(33,417	)		(29,937	)
Inventories, net	$	86,715		$	46,001

Property and equipment, net

Property and equipment, net consist of the following (in thousands, except as indicated):

	Useful lives (in years)		June 30, 2021			December 31, 2020
Surgical instruments		4	$	106,472		$	76,669
Machinery and equipment		7		9,757			6,562
Computer equipment		3		4,060			4,206
Office furniture and equipment		5		3,219			1,380
Leasehold improvements	various			688			1,761
Construction in progress	n/a			1,535			2,738
				125,731			93,316
Less accumulated depreciation and amortization				(59,680	)		(56,646	)
Property and equipment, net			$	66,051		$	36,670

Intangible assets, net

Intangible assets, net consist of the following (in thousands, except as indicated):

	Remaining Avg. Useful lives (in years)		June 30, 2021			December 31, 2020
Developed product technology		10	$	90,445		$	35,376
License agreements		1		5,536			5,536
Trademarks and trade names		9		6,692			792
Customer-related		5		16,800			7,458
Distribution network		2		4,027			4,027
In process research and development		7		1,128			1,278
Total gross amount			$	124,628		$	54,467
Less accumulated amortization				(31,647	)		(29,747	)
Intangible assets, net			$	92,981		$	24,720

Schedule of intangible assets, future expected amortization expense

Future amortization expense related to intangible assets as of June 30, 2021 is as follows (in thousands)

Year Ending December 31,
Remainder of 2021	$	5,330
2022		9,550
2023		9,550
2024		9,447
2025		8,862
Thereafter		50,242
	$	92,981

Accrued expenses

Accrued expenses consist of the following (in thousands):

	June 30, 2021		December 31, 2020
Commissions and sales milestones	$	11,477	$	7,038
Payroll and payroll related		13,764		13,552
Litigation settlement obligation - short-term portion		4,000		4,000
Professional fees		2,971		3,551
Royalties		3,406		2,293
Interest		109		619
Administration fees		1,408		442
Accrued manufacturing expense		1,094		—
Other		5,226		3,769
Total accrued expenses	$	43,455	$	35,264

Schedule of Other Long-Term Liabilities

Other long-term liabilities consist of the following (in thousands):

	June 30, 2021		December 31, 2020
Litigation settlement obligation - long-term portion	$	5,795	$	7,634
Tax liabilities		3,345		373
Royalties		2,655		1,678
Other		3,348		1,703
Other long-term liabilities	$	15,143	$	11,388