Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Consolidated gross profit	$ 4,284		$ 4,409		$ 4,505		$ 3,442		$ 3,688	$ 3,818	$ 3,793	$ 2,817	$ 16,640		$ 14,116		$ 13,092
Consolidated loss from operations	816	[1]	1,032	[1]	825	[1]	(155)	[1]	780	2,432	(632)	(2,409)	2,518		171		(5,098)
Consolidated depreciation and amortization													1,935		1,913		2,131
Consolidated assets	41,901								41,451				41,901		41,451
Restructuring charges			100		100		400						692		1,728		0
Gain on sale of assets and license agreement													0		1,568		0
DIS
Segment Reporting Information [Line Items]
Consolidated gross profit													10,449		9,343		8,771
Consolidated loss from operations													220		30		(48)
Consolidated depreciation and amortization													1,672		1,436		1,814
Consolidated assets	18,724								11,874				18,724		11,874
Diagnostic Imaging
Segment Reporting Information [Line Items]
Consolidated gross profit													6,191		4,773		4,321
Consolidated loss from operations													2,298	[2]	141	[2]	(5,050)	[2]
Consolidated depreciation and amortization													263		477		317
Consolidated assets	$ 23,177								$ 29,577				$ 23,177		$ 29,577

[1] (1) On March 13, 2014, we acquired 100% of the membership interest of Telerhythmics, LLC. The results of Telerhythmics are included in Diagnostic Services since the acquisition date (See Note 3).(2) Included in the income (loss) from operations for the first, second, third, and fourth quarter of 2014, are approximately $0.4 million, $0.1 million, $0.1 million, and less than $0.1 million of charges, respectively, associated with our Diagnostic Imaging and Facilities restructuring initiatives (See Note 11).

[2] Included in the Diagnostic Imaging income from operations for the year ended December 31, 2014, are approximately $0.7 million of charges associated with our Diagnostic Imaging and Facilities restructuring initiatives (See Note 11). Included in the Diagnostic Imaging income from operations for the year ended December 31, 2013, are approximately $1.7 million of charges associated with our Diagnostic Imaging restructuring initiative, as well as a gain of approximately $1.6 million associated with the sale of assets and licensing agreement from an uncommercialized surgical imaging system previously in development (See Note 12).