Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2020

Balance Sheet Related Disclosures [Abstract]

Schedule of Accounts Receivable, Net

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

	March 31,		December 31,
	2020		2019
Accounts receivable	$	32,541	$	35,757
Accounts receivable, unbilled		5,593		4,795
Allowance for doubtful accounts		(60)		(60)
Total accounts receivable, net	$	38,074	$	40,492

Schedule of Inventories

Inventories consisted of the following (in thousands):

	March 31,		December 31,
	2020		2019
Raw materials	$	1,843	$	6,081
Work-in-process		10,051		6,715
Finished goods		10,316		7,227
Total inventories	$	22,210	$	20,023

Schedule of Property and Equipment, Net

Property and equipment, net consisted of the following (in thousands):

	March 31,		December 31,
	2020		2019
Machinery and equipment	$	17,057	$	17,522
Leasehold improvements		4,444		4,445
Computer software		4,791		4,142
Furniture and fixtures		744		733
Construction in progress		299		115
Property and equipment, at cost		27,335		26,957
Accumulated depreciation and amortization		(19,537)		(18,844)
Property and equipment, net	$	7,798	$	8,113

Schedule of Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following (in thousands):

	March 31,		December 31,
	2020		2019
Accrued sales commission payable	$	258	$	389
Accrued manufacturing expenses		1,686		1,106
Liabilities to certain customers		2,242		4,144
Warranty reserve		504		513
Income tax payable		513		132
Deferred revenue, current portion		224		415
Interest payable		171		950
Other accrued liabilities		1,508		1,719
Total accrued expenses and other current liabilities	$	7,106	$	9,368