Income Taxes - Temporary Differences and Carry Forwards Which Give Rise to Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets
Net operating loss carryforwards	$ 20,218	$ 17,610	$ 8,888
Deferred revenue and setup charges	1,299	3,171	3,435
Operating lease liabilities	2,266
Property and equipment	512
Leases		1	453
Credits	300	287	543
Bad debt reserve	18	409	2,250
Intangibles	804
Interest expense carryforward IRC Sec. 163(j)	2,782	2,253
Other	1,376	1,534	1,607
Gross deferred tax assets	29,575	25,265	17,176
Deferred tax liabilities
Property and equipment		(3,089)	(4,940)
Goodwill	(2,494)	(1,953)	(1,396)
Intangibles	(591)	(11,910)	(13,606)
Operating lease right-of-use assets	(1,261)
Other	(1,231)	(1,049)	(1,132)
Gross deferred tax liabilities	(5,577)	(18,001)	(21,074)
Net deferred tax asset/(liability)	23,998	7,264	(3,898)
Valuation allowance	(24,747)	(8,361)	(713)
Net deferred tax liability	$ (749)	$ (1,097)	$ (4,611)