4. Geographic Information

The geographical distribution of long-lived assets to geographical areas consisted of the following at:



		March 31,		December 31,
		2019		2018
United States	$	10,639	$	10,065
Singapore		1,200		1,240
Other		422		427
Consolidated	$	12,261	$	11,732

Long-lived assets consist of property and equipment. Excluded from long-lived assets are investments in partnerships, patents, goodwill, operating lease ROU assets and certain other assets. The Company capitalizes long-lived assets pertaining to the production of specialized parts. These assets are periodically reviewed to ensure the net realizable value from the estimated future production based on forecasted cash flows exceeds the carrying value of the assets.

The geographical distribution of net revenue to geographical areas for the three months ended March 31, 2019 and 2018 were as follows:



		Three Months Ended
Net Revenue to Geographical Areas		March 31, 2019		March 31, 2018
United States	$	24,215	$	20,459
Europe		2,203		2,278
Asia		3,509		2,468
All other countries		182		158
Consolidated	$	30,109	$	25,363

Geographic net revenue is allocated based on the location of the customer.

For the three months ended March 31, 2019, one customer accounted for 57% of the Company’s consolidated net revenue. For the three months ended March 31, 2018, one customer accounted for 54% of the Company’s consolidated net revenue.

Two customers combined accounted for 49% and 52% of the Company’s consolidated accounts receivable at March 31, 2019 and December 31, 2018, respectively.

One customer accounted for 67% and 78% of the Company’s consolidated contract assets at March 31, 2019 and December 31, 2018, respectively.