Composition of Certain Balance Sheet Items (Tables)

12 Months Ended

Dec. 31, 2017

Balance Sheet Related Disclosures [Abstract]

Composition of Inventory

	December 31,
	2017			2016
	(in thousands)
Raw materials	$	4,287		$	1,848
Work in progress		64			1,414
Finished goods		4,025			1,902
Total inventory		8,376			5,164
Less strategic inventory classified as non-current		(3,800	)		(2,835	)
Total inventory classified as current	$	4,576		$	2,329

Property and Equipment

		December 31,
		2017			2016
	(in thousands)
Furniture and equipment		$	188		$	300
Software			705			351
Leasehold improvements			14			6
			907			657
Less: accumulated depreciation			(389	)		(452	)
		$	518		$	205

Other Accrued Liabilities

	December 31,
	2017		2016
	(in thousands)
Government rebates	$	7,961	$	3,426
Accrued compensation		8,574		4,702
Accrued manufacturing costs		955		—
Commercialization costs		208		308
Legal fees		276		164
Professional fees		207		34
Other		562		319
Total other accrued liabilities	$	18,743	$	8,953