Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2019

Balance Sheet Related Disclosures [Abstract]

Schedule of Accounts Receivable, Net

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

	December 31,
	2019		2018
Accounts receivable	$	39,199	$	22,490
Accounts receivable, unbilled		1,353		751
Allowance for doubtful accounts		(60)		(30)
Total accounts receivable, net	$	40,492	$	23,211

Schedule of Inventories

Inventories consisted of the following (in thousands):

	December 31,
	2019		2018
Raw materials	$	6,081	$	1,427
Work-in-process		6,715		11,451
Finished goods		7,227		5,757
Total inventories	$	20,023	$	18,635

Schedule of Property and Equipment, Net

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

	December 31,
	2019		2018
Machinery and equipment	$	17,522	$	15,537
Leasehold improvements		4,445		4,422
Computer software		4,142		3,760
Furniture and fixtures		733		372
Construction in progress		115		52
Property and equipment, at cost		26,957		24,143
Accumulated depreciation and amortization		(18,844)		(17,058)
Property and equipment, net	$	8,113	$	7,085

Schedule of Accrued Expenses and Other Current Liabilities

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

	December 31,
	2019		2018
Accrued sales commission payable	$	389	$	387
Accrued manufacturing expenses		1,106		692
Deferred rent, current portion		—		514
Liabilities to certain customers		4,144		366
Warranty reserve		513		505
Deferred revenue, current portion		415		1,848
Income tax payable		132		172
Interest payable		950		—
Other accrued liabilities		1,719		688
Total accrued expenses and other current liabilities	$	9,368	$	5,172