Acquisition - Purchase price allocation (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Intangible assets	$ 6,248		$ 6,248
Goodwill	633		633
Customer portal (existing technologies)
Business Acquisition [Line Items]
Intangible assets	4,151		4,151
Customer relationships
Business Acquisition [Line Items]
Intangible assets	2,097		$ 2,097
AHS acquisition
Business Acquisition [Line Items]
Accounts receivable, net of allowance of $2		$ 918
Inventory and other current assets		117
Fixed assets		123
Goodwill		633
Accounts payable and accrued expenses		(743)
Deferred revenue		(296)
Purchase Price		7,000
Accounts receivable, allowance		$ 2
AHS acquisition | Customer portal (existing technologies)
Business Acquisition [Line Items]
Intangible assets	4,151
AHS acquisition | Customer relationships
Business Acquisition [Line Items]
Intangible assets	$ 2,097