Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Summary of income (loss) before income taxes for U.S. and non-U.S. operations

Income (loss) before income taxes for U.S and non-U.S operations was as follows:



	Year Ended December 31,
	2015			2014			2013
U.S. loss	$	(16,235	)	$	(18,078	)	$	(15,622	)
Non U.S. loss	(105		)	(1,842		)	—
	$	(16,340	)	$	(19,920	)	$	(15,622	)

Schedule of reconciliation of income taxes computed using the federal statutory rate to the taxes reported in consolidated statements of operations

A reconciliation of income taxes computed using the federal statutory rate to the taxes reported in the consolidated statements of operations is as follows:



	Year Ended December 31,
(In thousands)	2015			2014			2013
Loss before income taxes	$	(16,340	)	$	(19,920	)	$	(15,622	)
Federal statutory rate	34		%	34		%	34		%
Taxes computed at federal statutory rate	(5,556		)	(6,773		)	(5,311		)
State taxes (net of federal benefit)	(392		)	(463		)	—
Warrants	(118		)	(10		)	(1,815		)
Nondeductible stock compensation	543			48			81
Michigan NOL benefit	—			—			(791		)
Net operating loss expirations	—			655			612
Write-off of Section 382 limited NOL’s	—			67,781			—
Write-off of Section 383 limited R&D credits	—			1,600			—
Other	57			352			(27		)
Adjustment to prior year filed returns	(5,203		)	—			—
Change in valuation allowance	10,669			(63,190		)	7,251
Reported income taxes	$	—		$	—		$	—

Schedule of deferred tax assets

Deferred tax assets consist of the following:



	Year Ended December 31,
(In thousands)	2015			2014
Net operating loss carryforwards	$	13,998		$	7,092
Employee benefits and stock compensation	2,485			1,897
Research and development costs	4,903			2,184
Fixed assets	453			254
Intangible assets	(477		)	(510		)
Asset retirement obligation	—			127
Inventory reserve	510			186
Other, net	143			115
Total deferred tax assets	22,015			11,345
Valuation allowance	(22,015		)	(11,345		)
Net deferred tax assets	$	—		$	—

Schedule of reconciliation of uncertain tax provision

A reconciliation of the beginning and ending amounts of uncertain tax provision is as follows:



	Unrecognized Income Tax
(In thousands)	Benefits
Balance at December 31, 2013	$	900
Decrease in prior year tax positions	(900		)
Balance at December 31, 2014 and 2015	$	—