Balance Sheets Components

3 Months Ended

Mar. 31, 2021

Balance Sheet Related Disclosures [Abstract]

Balance Sheets Components

Note 4. Balance Sheet Components

Accounts Receivable, net

Accounts receivable, net consisted of the following:

	As of
	March 31, 2021			December 31, 2020
	(in thousands)
Accounts receivable, gross	$	22,264		$	23,970
Allowance for credit losses		(50	)		(50	)
Accounts receivable, net	$	22,214		$	23,920

Inventories

Inventories consisted of the following:

	As of
	March 31, 2021		December 31, 2020
	(in thousands)
Raw materials	$	1,900	$	435
Work in progress		11,210		10,184
Finished goods		1,870		1,731
Total inventories	$	14,980	$	12,350

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following:

	As of
	March 31, 2021		December 31, 2020
	(in thousands)
Advance to suppliers	$	587	$	853
Prepaid expenses		1,105		1,074
Other current assets		885		722
Total prepaid expenses and other current assets	$	2,577	$	2,649

Property and Equipment, Net

Property and equipment, net consisted of the following:

	As of
	March 31, 2021			December 31, 2020
	(in thousands)
Lab and manufacturing equipment	$	26,020		$	21,958
Computer Equipment		1,199			1,121
Furniture and fixtures		249			237
Construction in progress		638			638
Leasehold improvements		4,293			4,134
		32,399			28,088
Accumulated depreciation		(17,472	)		(16,380	)
Total property and equipment, net	$	14,927		$	11,708

Depreciation expense related to property and equipment was $1.1 million and $0.9 million for the three months ended March 31, 2021 and 2020, respectively.

Intangible Assets, Net

Intangible assets, net consisted of the following:

	As of
	March 31, 2021			December 31, 2020
	(in thousands)
Internal use software	$	9,405		$	9,377
Purchased intangibles		6,658			5,663
		16,063			15,040
Accumulated amortization		(13,505	)		(12,971	)
Intangible assets, net	$	2,558		$	2,069

Amortization expense for intangible assets was $0.5 million and $1.1 million for the three months ended March 31, 2021 and 2020, respectively.

As of March 31, 2021, the Company had $0.8  million of intangibles that were still in development stage and were not being amortized. The estimated aggregate future amortization expense for intangible assets in development stage and subject to amortization as of March 31, 2021 is summarized as below:

	(in thousands)
2021 (remainder)	$	1,172
2022		722
2023		316
2024		160
2025 and beyond		189
	$	2,558

Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following:

	As of
	March 31, 2021		December 31, 2020
	(in thousands)
Accrued payroll and related benefits	$	4,954	$	5,362
Price adjustment and other revenue reserves		3,867		3,063
Short term lease liability		1,035		1,264
Other accrued expenses		2,860		3,274
Total accrued expenses and other current liabilities	$	12,716	$	12,963