Select Condensed Consolidated Balance Sheet Details (Tables)

3 Months Ended

Mar. 31, 2019

Balance Sheet Related Disclosures [Abstract]

Accounts receivable, net

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

	March 31, 2019			December 31, 2018
Accounts receivable	$	13,966		$	15,291
Allowance for doubtful accounts		(206	)		(196	)
Accounts receivable, net	$	13,760		$	15,095

Inventories, net

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

	March 31, 2019			December 31, 2018
Raw materials	$	5,862		$	5,813
Work-in-process		805			952
Finished goods		43,613			39,758
		50,280			46,523
Less reserve for excess and obsolete finished goods		(19,114	)		(17,758	)
Inventories, net	$	31,166		$	28,765

Property and equipment, net

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

	Useful lives (in years)		March 31, 2019			December 31, 2018
Surgical instruments		4	$	52,441		$	54,848
Machinery and equipment		7		5,993			5,971
Computer equipment		3		3,307			3,104
Office furniture and equipment		5		1,195			1,155
Leasehold improvements	various			1,765			1,765
Construction in progress	n/a			53			92
				64,754			66,935
Less accumulated depreciation and amortization				(51,933	)		(53,700	)
Property and equipment, net			$	12,821		$	13,235

Intangible assets, net

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

	Remaining Avg. Useful lives (in years)		March 31, 2019			December 31, 2018
Developed technology		10	$	26,976		$	26,976
Intellectual property		—		1,004			1,004
License agreements		1		5,536			5,536
Trademarks and trade names		—		792			792
Customer-related		4		7,458			7,458
Distribution network		3		4,027			4,027
In process research and development		19		8,800			8,800
				54,593			54,593
Less accumulated amortization				(28,367	)		(28,185	)
Intangible assets, net			$	26,226		$	26,408

Schedule of intangible assets, future expected amortization expense

Future amortization expense related to intangible assets as of March 31, 2019 is as follows (in thousands):

Year Ending December 31,
Remainder of 2019	$	1,558
2020		1,890
2021		1,890
2022		1,890
2023		1,890
Thereafter		17,108
	$	26,226

Accrued expenses

Accrued expenses consist of the following (in thousands):

	March 31, 2019		December 31, 2018
Commissions and sales milestones	$	3,885	$	3,594
Payroll and payroll related		3,419		3,222
Litigation settlement obligation		4,400		4,400
Professional fees		2,366		2,637
Royalties		1,471		1,354
Restructuring and severance accruals		162		710
Taxes		31		(3	)
Interest		127		261
Acquisition related - contingent consideration		-		2,600
Other		2,666		3,541
Total accrued expenses	$	18,527	$	22,316