SELECTED BALANCE SHEET COMPONENTS (Tables)

6 Months Ended

Jun. 30, 2017

Balance Sheet Related Disclosures [Abstract]

Schedule of inventory

Inventory as of June 30, 2017 and December 31, 2016:

(In thousands)	June 30, 2017		December 31, 2016
Raw materials	$	2,892	$	3,214
Work-in-process	250		257
Finished goods	13		17
Inventory	$	3,155	$	3,488

Schedule of property and equipment, net

Property and equipment, net as of June 30, 2017 and December 31, 2016: 

(In thousands)	June 30, 2017			December 31, 2016
Machinery and equipment	$	3,234		$	3,150
Furniture, fixtures and office equipment	931			931
Computer equipment and software	3,265			3,147
Leasehold improvements	3,332			3,332
Construction in process	608			408
Total property and equipment, gross	11,370			10,968
Less: Accumulated depreciation	(7,877		)	(7,093		)
	$	3,493		$	3,875

Schedule of accounts payable and accrued expenses

Accrued expenses as of June 30, 2017 and December 31, 2016:

(In thousands)	June 30, 2017		December 31, 2016
Bonus related compensation	$	1,335	$	2,433
Employee related accruals	1,696		1,668
Clinical trial related accruals	589		422
Other	515		—
	$	4,135	$	4,523