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

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Disaggregation of revenue

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

	Three months ended March 31,
	2018		2017
Net sales:
Commercial	$	2,205	$	3,079
Military maritime	2,454		1,027
Total net sales	$	4,659	$	4,106

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 March 31,
	2018			2017
Numerator:
Net loss	$	(2,390	)	$	(4,522	)
Denominator:
Basic weighted average common shares outstanding	11,900			11,718
Potential common shares from equity awards and warrants	—			—
Diluted weighted average shares	11,900			11,718

Schedule of warranty activity

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

	Three months ended March 31,
	2018			2017
Balance at beginning of period	$	174		$	331
Warranty accruals for current period sales	8			13
Adjustments to existing warranties	(1		)	(50		)
In kind settlements made during the period	(40		)	(36		)
Accrued warranty reserve	$	141		$	258