Selected Balance Sheet Components

Inventory as of June 30, 2015 and December 31, 2014:



(In thousands)	June 30, 2015		December 31, 2014
Raw materials	$	1,665	$	1,078
Work-in-process	231		458
Finished goods	182		384
Inventory	$	2,078	$	1,920

Property and equipment, net as of June 30, 2015 and December 31, 2014:



(In thousands)	June 30, 2015			December 31, 2014
Machinery and equipment	$	3,147		$	3,135
Furniture, fixtures and office equipment	931			777
Computer equipment and software	1,614			667
Leasehold improvements	1,768			1,691
Construction in process	2,014			1,019
Total property and equipment, gross	9,474			7,289
Less: Accumulated depreciation	(4,858		)	(4,397		)
	$	4,616		$	2,892

Depreciation expense for the three and six months ended June 30, 2015 was $0.2 million and $0.5 million respectively, compared to $0.1 million and $0.2 million, respectively, for the same periods in 2014.

Intangible assets, net as of June 30, 2015 and December 31, 2014:



(In thousands)	June 30, 2015			December 31, 2014
Commercial rights	$	3,360		$	3,360
Less: Accumulated amortization	(303		)	(163		)
	$	3,057		$	3,197

Amortization expense was $0.1 million and $0.2 million for the three and six months ended June 30, 2015, respectively. Amortization expense was less than $0.1 million for both the three and six months ended June 30, 2014.

Estimated future amortization expense is as follows:



Calendar Years Ending December 31, (In thousands)
2015	$	140
2016	280
2017	280
2018	280
2019	280
Thereafter	1,797
Total	$	3,057

Accrued expenses as of June 30, 2015 and December 31, 2014:



(In thousands)	June 30, 2015		December 31, 2014
Bonus	$	1,133	$	2,044
Employee related accruals	1,432		1,281
Accrued expenses	140		605
Asset retirement obligation	317		348
Other	236		436
	$	3,258	$	4,714

Accumulated other comprehensive loss in 2014 consisted entirely of foreign currency translation activity. Foreign currency translation loss recorded in 2014 was mainly the result of the weakening U.S. dollar and its impact on intercompany balances with the Denmark subsidiary. No changes related to unrealized gains or losses in foreign currency translation were recorded during the three and six months ended June 30, 2015 due to a change in the functional currency of the Denmark subsidiary from the Danish Krone to the U.S. dollar.