Revenue, Deferred Revenue and Prepaid Commissions (Tables)

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

The following table presents our revenues disaggregated by revenue type:



	For the Twelve Months Ended December 31,
(Dollars in thousands)	2019		2018		2017
Revenue - wireless
Paging revenue	85,067		90,570		97,296
Product and other revenue	3,100		3,707		3,892
Total wireless revenue	88,167		94,277		101,188

Revenue - software
License	8,950		13,042		9,541
Services	19,189		18,091		17,630
Equipment	3,618		4,995		4,147
Operations revenue	$	31,757	$	36,128	$	31,318
Maintenance revenue	$	40,365	$	39,069	$	38,669
Total software revenue	$	72,122	$	75,197	$	69,987
Total revenue	$	160,289	$	169,474	$	171,175

The Company is currently structured as a single operating (and reportable) segment, a clinical communication and collaboration business. The U.S. was the only country that accounted for more than 10% of the Company’s total revenue for the years ended December 31, 2019, 2018 and 2017. Revenue generated in the U.S. and internationally consisted of the following for the periods stated:



	For the Twelve Months Ended December 31,
(Dollars in thousands)	2019		2018		2017
Revenue
United States	$	154,766	$	164,558	$	166,790
International	5,523		4,916		4,385
Total revenue	$	160,289	$	169,474	$	171,175

Schedule of Deferred Revenue

Changes in the balance of total deferred revenue during the twelve months ended December 31, 2019 are as follows:



(Dollars in thousands)	December 31, 2018		Additions		Revenue Recognized			December 31, 2019
Deferred Revenue	$	26,582	$	70,684	$	(70,645	)	$	26,621

Schedule of Deferred Commissions

Changes in the balance of total prepaid commissions during the twelve months ended December 31, 2019 are as follows:



(Dollars in thousands)	December 31, 2018		Additions		Commissions Recognized			December 31, 2019
Prepaid Commissions	$	2,394	$	5,031	$	(4,994	)	$	2,431