Selected Balance Sheet Components - (Tables)

9 Months Ended

Sep. 30, 2019

Balance Sheet Related Disclosures [Abstract]

Schedule of inventory

Inventory as of September 30, 2019 and December 31, 2018:

(In thousands)	September 30, 2019		December 31, 2018
Raw materials	$	5,730	$	2,872
Work-in-process	976		638
Finished goods	117		48
Inventory	$	6,823	$	3,558

Schedule of property and equipment, net

Property and equipment, net as of September 30, 2019 and December 31, 2018: 

(In thousands)	September 30, 2019			December 31, 2018
Machinery and equipment	$	2,577		$	1,536
Furniture, fixtures and office equipment	775			775
Computer equipment and software	6,007			3,712
Leasehold improvements	4,631			4,587
Construction in process	1,716			2,801
Financing right-of-use lease	157			—
Total property and equipment, gross	15,863			13,411
Less: Accumulated depreciation	(8,673		)	(7,505		)
	$	7,190		$	5,906

Depreciation expense for the three and nine months ended September 30, 2019 was $0.4 million and $1.2 million and $0.3 million and $1.1 million for the same period in 2018.

Schedule of accounts payable and accrued expenses

Accrued expenses as of September 30, 2019 and December 31, 2018:

(In thousands)	September 30, 2019		December 31, 2018
Bonus related compensation	$	3,426	$	5,161
Employee related accruals	2,546		1,559
Other accrued expenses	988		210
	$	6,960	$	6,930