Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

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,
	2018			2017			2016
U.S. loss	$	(8,056	)	$	(17,066	)	$	(19,302	)
Non U.S. loss	(81		)	(220		)	(264		)
	$	(8,137	)	$	(17,286	)	$	(19,566	)

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)	2018			2017			2016
Loss before income taxes	$	(8,137	)	$	(17,286	)	$	(19,566	)
Federal statutory rate	21		%	34		%	34		%
Taxes computed at federal statutory rate	(1,709		)	(5,877		)	(6,652		)
State taxes (net of federal benefit)	(385		)	(1,106		)	(1,016		)
Nondeductible stock compensation	(605		)	563			549
Federal and State Rate Change	839			11,749			(614		)
Other	172			116			56
Change in valuation allowance	1,688			(5,445		)	7,677
Reported income taxes	$	—		$	—		$	—

Schedule of deferred tax assets

Deferred tax assets consist of the following:

	Year Ended December 31,
(In thousands)	2018			2017
Net operating loss carryforwards	$	10,969		$	10,487
Employee benefits and stock compensation	2,798			2,128
Research and development costs	9,067			8,275
Fixed assets	418			508
Inventory reserve	2,339			2,568
Other, net	345			282
Total deferred tax assets	25,936			24,248
Valuation allowance	(25,936		)	(24,248		)
Net deferred tax assets	$	—		$	—