The carrying value of goodwill was $0.5 million as of June 29, 2019 and December 29, 2018.

Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in a business combination. The Company reviews goodwill for impairment on an annual basis or whenever events or changes in circumstances indicate the carrying value may not be recoverable. The Company performs an annual impairment test by comparing the fair value of a reporting unit with its carrying amount. An impairment charge should be recognized for the amount by which the carrying amount exceed the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. In addition, income tax effects from any tax deductible goodwill carrying amount of the reporting unit should be considered when measuring the goodwill impairment loss, if applicable. The Company has determined that it has a single reporting unit for purposes of performing its goodwill impairment test. As the Company uses the market approach to assess impairment, its common stock price is an important component of the fair value calculation. If the Company’s stock price continues to experience significant price and volume fluctuations, this will impact the fair value of the reporting unit and can lead to potential impairment in future periods. The Company performed its annual impairment test during the second quarter of fiscal year 2019 and determined that its goodwill was not impaired. As of June 29, 2019, the Company had not identified any factors that indicated there was an impairment of its goodwill and determined that no additional impairment analysis was then required.

The following table summarizes the components of gross and net intangible asset balances (in thousands):

June 29, 2019

December 29, 2018

Gross

Carrying

Amount

Accumulated

Amortization

Net

Carrying

Amount

Remaining

Amortization Life

Gross

Carrying

Amount

Accumulated

Amortization

Net

Carrying

Amount

Customer relationships

240

148

5.75 Years

240

140

100

For the six months ended June 29, 2019 and June 30, 2018, amortization expense totaled $8 thousand for each period.

The amortization of customer relationships was charged to sales and marketing expense and the amortization of patents was charged to cost of revenues. Future estimated amortization expense (in thousands):

Fiscal Year:
2019 (six months)	$	8
2020		16
2021		16
2022		16
2023		16
Thereafter		20
Total	$	92