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

3 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Disaggregation of revenue

The following table provides a disaggregation of product net sales for the periods presented (in thousands):

	Three months ended March 31,
	2020		2019
Net sales:
Commercial	$	1,736	$	1,983
MMM products	2,047		1,194
Total net sales	$	3,783	$	3,177

Reconciliation of basic and diluted income (loss) per share

The following table presents a reconciliation of basic and diluted loss per share computations (in thousands):

	Three months ended March 31,
	2020		2019
Numerator:
Net loss	$	(541)	$	(2,865)
Denominator:
Basic weighted average common shares outstanding	15,430		12,126

Schedule of warranty activity

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

	Three months ended March 31,
	2020		2019
Balance at beginning of period	$	195	$	258
Warranty accruals for current period sales	7		12
Adjustments to existing warranties	44		89
In kind settlements made during the period	(6)		(7)
Accrued warranty reserve	$	240	$	352

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following table provides a summary of the financial assets and liabilities measured at fair value on a recurring basis as of March 31, 2020 (in thousands):

			Fair Value Measurements at March 31, 2020 Using
	Balance as of		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Description	March 31, 2020
Warrant liabilities	$	763	$	—	$	—	$	763

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation

A roll-forward of fair value measurements using significant unobservable inputs (Level 3) for the warrants is as follows (in thousands):

	Three months ended March 31, 2020
Balance January 1, 2020	$	—
Issuance of warrants January 2020	1,636
Income from change in fair value of warrants	(873)
Balance March 31, 2020	$	763