SELECTED BALANCE SHEET COMPONENTS (Tables)

3 Months Ended

Mar. 31, 2017

Balance Sheet Related Disclosures [Abstract]

Schedule of inventory

Inventory as of March 31, 2017 and December 31, 2016:

(In thousands)	March 31, 2017		December 31, 2016
Raw materials	$	3,711	$	3,214
Work-in-process	225		257
Finished goods	22		17
Inventory	$	3,958	$	3,488

Schedule of property and equipment, net

Property and equipment, net as of March 31, 2017 and December 31, 2016: 

(In thousands)	March 31, 2017			December 31, 2016
Machinery and equipment	$	3,150		$	3,150
Furniture, fixtures and office equipment	931			931
Computer equipment and software	3,266			3,147
Leasehold improvements	3,332			3,332
Construction in process	461			408
Total property and equipment, gross	11,140			10,968
Less: Accumulated depreciation	(7,502		)	(7,093		)
	$	3,638		$	3,875

Schedule of accounts payable and accrued expenses

Accrued expenses as of March 31, 2017 and December 31, 2016:

(In thousands)	March 31, 2017		December 31, 2016
Bonus related compensation	$	3,061	$	2,433
Employee related accruals	1,967		1,668
Clinical trial related accruals	605		422
Other	397		—
	$	6,030	$	4,523