Basis of Presentation and Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Disaggregation of revenue

The following table provides a disaggregation of product net sales for the periods presented:

	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Net sales:
Commercial	$	2,972	$	5,178	5,177		8,257
Military maritime	2,200		833		4,654		1,860
Total net sales	$	5,172	$	6,011	$	9,831	$	10,117

Reconciliation of basic and diluted income (loss) per share

The following is a reconciliation of the numerator and denominator of the basic and diluted net loss per share computations for the periods presented below (in thousands):

	Three months ended June 30,						Six months ended June 30,
	2018			2017			2018			2017
Numerator:
Net loss	$	(1,804	)	$	(3,114	)	$	(4,194	)	$	(7,636	)
Denominator:
Basic weighted average common shares outstanding	11,949			11,791			11,925			11,755
Potential common shares from equity awards and warrants	—			—			—			—
Diluted weighted average shares	11,949			11,791			11,925			11,755

Schedule of warranty activity

The following table summarizes warranty activity for the periods presented (in thousands):

	Three months ended June 30,						Six months ended June 30,
	2018			2017			2018			2017
Balance at beginning of period	$	141		$	258		$	174		$	331
Warranty accruals for current period sales	7			31			15			44
Adjustments to existing warranties	55			(16		)	54			(66		)
In kind settlements made during the period	(7		)	(94		)	(47		)	(130		)
Accrued warranty reserve	$	196		$	179		$	196		$	179