Discontinued Operations Results for Discontinued Operations to the Net Income (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								9 Months Ended	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018
Costs and Expenses [Abstract]
Income from discontinued operations, net of taxes	$ (573)	$ (1,036)	$ 50,630	$ 243	$ 843	$ 757	$ 1,059	$ 553		$ 49,264	$ 3,212
Net income from discontinued operations per common share
Basic and diluted (in dollars per share)										$ 2.82	$ 0.19
Weighted average number of common shares outstanding:
Basic and diluted (in shares)										17,459	17,072
Discontinued Operations, Disposed of by Sale
Sales:
Service sales										$ 5,769
Costs and Expenses [Abstract]
Costs of service sales										1,807
Sales, marketing and support										1,606
General and administrative										1,619
Other expense, net										(23)
Income from discontinued operations before tax expense										714
Gain on sale of discontinued operations before tax expense										53,711
Total income from discontinued operations before tax expense										54,425
Income tax expense on discontinued operations										5,161
Income from discontinued operations, net of taxes										$ 49,264
Net income from discontinued operations per common share
Basic and diluted (in dollars per share)										$ 2.82
Discontinued Operations, Held-for-sale
Sales:
Service sales											$ 17,732
Costs and Expenses [Abstract]
Costs of service sales											5,148
Sales, marketing and support											4,339
General and administrative											4,763
Other expense, net											(51)
Income from discontinued operations before tax expense											3,431
Gain on sale of discontinued operations before tax expense									$ 0
Total income from discontinued operations before tax expense											3,431
Income tax expense on discontinued operations											219
Income from discontinued operations, net of taxes											$ 3,212
Net income from discontinued operations per common share
Basic and diluted (in dollars per share)											$ 0.19