3.	REVENUE RECOGNITION

Substantially all of our revenues are considered to be revenues from contracts with students. The related accounts receivable balances are recorded in our balance sheets as student accounts receivable. We do not have significant revenue recognized from performance obligations that were satisfied in prior periods, and we do not have any transaction price allocated to unsatisfied performance obligations other than in our unearned tuition. We record revenue for students who withdraw from our schools only to the extent that it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur. Unearned tuition represents contract liabilities primarily related to our tuition revenue. We have elected not to provide disclosure about transaction prices allocated to unsatisfied performance obligations if contract durations are less than one-year, or if we have the right to consideration from a student in an amount that corresponds directly with the value provided to the student for performance obligations completed to date. We have assessed the costs incurred to obtain a contract with a student and determined them to be immaterial.

Unearned tuition in the amount of $22.9 million and $22.5 million is recorded in the current liabilities section of the accompanying condensed consolidated balance sheets as of September 30, 2019 and December 31, 2018, respectively. The change in this contract liability balance during the nine month period ended September 30, 2019 is the result of payments received in advance of satisfying performance obligations, offset by revenue recognized during that period. Revenue recognized for the nine month period ended September 30, 2019 that was included in the contract liability balance at the beginning of the year was $21.5 million.

The following table depicts the timing of revenue recognition:

	Three months ended September 30, 2019								Nine months ended September 30, 2019
	Transportation and Skilled Trades Segment		Healthcare and Other Professions Segment		Transitional Segment		Consolidated		Transportation and Skilled Trades Segment		Healthcare and Other Professions Segment		Transitional Segment		Consolidated
Timing of Revenue Recognition
Services transferred at a point in time	$	4,792	$	1,308	$	-	$	6,100	$	9,360	$	3,541	$	-	$	12,901
Services transferred over time		47,860		18,634		-		66,494		131,646		54,880		-		186,526
Total revenues	$	52,652	$	19,942	$	-	$	72,594	$	141,006	$	58,421	$	-	$	199,427

	Three months ended September 30, 2018								Nine months ended September 30, 2018
	Transportation and Skilled Trades Segment		Healthcare and Other Professions Segment		Transitional Segment		Consolidated		Transportation and Skilled Trades Segment		Healthcare and Other Professions Segment		Transitional Segment		Consolidated
Timing of Revenue Recognition
Services transferred at a point in time	$	4,514	$	1,162	$	56	$	5,732	$	8,219	$	2,847	$	62	$	11,128
Services transferred over time		46,492		17,089		765		64,346		127,619		49,707		4,633		181,959
Total revenues	$	51,006	$	18,251	$	821	$	70,078	$	135,838	$	52,554	$	4,695	$	193,087