Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2019

The following table disaggregates revenues by type within each of our business segments:

The following table summarizes the activity in our contract liabilities for the reporting period:



	Three Months Ended March 31,
	2019
Contract liability balance, beginning of period⁽¹⁾	$	97
Liabilities recognized during the period	26
Amounts recognized in revenue from beginning balance	(22		)
Contract liability balance, end of period⁽¹⁾	$	101
(1) Contract liabilities are included within Accrued liabilities and Other long-term liabilities in our March 31, 2019 consolidated balance sheet.

The following table summarizes our balances in these accounts for the periods indicated (other than contract liabilities disclosed above):



	Receivables		Contract Assets⁽¹⁾
Beginning of period balance	$	753	$	114
End of period balance, March 31, 2019	758		114
(1) Contract assets are included primarily within Prepaid expenses, deposits and other current assets in our March 31, 2019 consolidated balance sheet.