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

9 Months Ended

Sep. 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 September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Net sales:
Commercial	$	2,292	$	3,947	7,469		12,204
Military maritime	2,866		1,055		7,520		2,915
Total net sales	$	5,158	$	5,002	$	14,989	$	15,119

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 September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Numerator:
Net loss	$	(1,920	)	$	(1,773	)	$	(6,114	)	$	(9,409	)
Denominator:
Basic weighted average common shares outstanding	12,059			11,856			11,970			11,789
Potential common shares from equity awards and warrants	—			—			—			—
Diluted weighted average shares	12,059			11,856			11,970			11,789

Schedule of warranty activity

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

	Three months ended September 30,						Nine months ended September 30,
	2018			2017			2018			2017
Balance at beginning of period	$	196		$	179		$	174		$	331
Warranty accruals for current period sales	31			108			46			152
Adjustments to existing warranties	47			30			101			(36		)
In kind settlements made during the period	(14		)	(130		)	(61		)	(260		)
Accrued warranty reserve	$	260		$	187		$	260		$	187