Business Acquisitions Acquisition of Extension Healthcare (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	12 Months Ended
	Oct. 27, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill			$ 49,246	$ 49,246
Pro Forma Revenue					$ 134,330
Pro Forma Net Loss		$ 7,100			$ (31,787)
Pro Forma, Earnings Per Share, Basic And Diluted (in dollars per share)					$ (1,180)
Extension Healthcare
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 52,500
Business Acquisition, Transaction Costs		$ 5,800			$ 5,800
Accounts receivable, net of allowance	1,569
Prepaid expenses and other current assets	774
Property and equipment, net	48
Intangibles assets, net	17,200
Goodwill	39,258
Total assets	58,849
Accounts payable	(149)
Accrued payroll and other current liabilities	(1,984)
Deferred revenue, current	(2,992)
Deferred revenue, long-term	(1,224)
Total liabilities assumed	6,349
Net assets acquired	52,500
Recorded charge for planned redistribution of proceeds	2,600
Customer relationships | Extension Healthcare
Business Acquisition [Line Items]
Intangibles assets, net	$ 8,400
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years
Developed technology | Extension Healthcare
Business Acquisition [Line Items]
Intangibles assets, net	$ 6,400
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years
Trademarks | Extension Healthcare
Business Acquisition [Line Items]
Intangibles assets, net	$ 1,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years
Backlog | Extension Healthcare
Business Acquisition [Line Items]
Intangibles assets, net	$ 1,400
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years
Product Segment
Business Acquisition [Line Items]
Goodwill			41,200
Product Segment | Extension Healthcare
Business Acquisition [Line Items]
Goodwill	$ 31,200
Service Segment
Business Acquisition [Line Items]
Goodwill			8,000
Service Segment | Extension Healthcare
Business Acquisition [Line Items]
Goodwill	$ 8,000
Retention Bonus Plan | Extension Healthcare
Business Acquisition [Line Items]
Retention Bonus Plan, additional compensation period	2 years
Retention Bonus Plan, additional compensation	$ 2,600
Retention Bonus Plan, amounts paid			500	1,000	500
Retention Bonus Plan, amounts recorded as expense			$ 300	$ 1,000	700
Employee Severance | Extension Healthcare
Business Acquisition [Line Items]
Severance costs					500
Cost of revenue | Employee Severance | Extension Healthcare
Business Acquisition [Line Items]
Severance costs					100
Operating expense | Employee Severance | Extension Healthcare
Business Acquisition [Line Items]
Severance costs					$ 400