CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS EQUITY (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]	Total Merge Shareholders' Equity [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2012	$ 931	$ 577,774	$ (504,195)	$ 1,567	$ 77,011	$ 450	$ 77,461
Balance, common stock subscribed at Dec. 31, 2012	934
Balance, common stock issued (in shares) at Dec. 31, 2012	93,137,737						93,137,737
Balance, common stock subscribed (in shares) at Dec. 31, 2012	158,395						158,395
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued for acquisitions	1	123	0	0	(726)	0	(726)
Stock issued for acquisitions, common stock subscribed (in shares)	(122,292)
Stock issued for acquisitions, common stock subscribed	(850)
Stock issued for acquisitions, common stock issued (in shares)	40,225
Stock issued for settlement	4	881	0	0	885	0	885
Stock issued for settlement, common stock subscribed (in shares)	0
Stock issued for settlement, common stock subscribed	0
Stock issued for settlement, common stock issued (in shares)	400,000
Stock issued under ESPP, common stock subscribed	(22)
Stock issued under ESPP, common stock subscribed (in shares)	(11,037)
Stock issued under ESPP	1	217	0	0	196	0	196
Stock issued under ESPP, common stock issued (in shares)	83,419
Exercise of stock options	4	856	0	0	860	0	860
Exercise of stock options, common stock issued (in shares)	402,500
Share-based compensation expense	0	4,192	0	0	4,192	0	4,192
Net loss	0	0	(38,690)	0	(38,690)	(28)	(38,718)
Other comprehensive loss	0	0	0	178	178	0	178
Balance at Sep. 30, 2013	941	584,043	(542,885)	1,745	43,906	422	44,328
Balance, common stock subscribed at Sep. 30, 2013	$ 62
Balance, common stock issued (in shares) at Sep. 30, 2013	94,063,881						94,063,881
Balance, common stock subscribed (in shares) at Sep. 30, 2013	25,066						25,066