Fair Value Measurements (Details 3) (USD $)	3 Months Ended
	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013
Reconciliation of liability measured and recorded at fair value on a recurring basis using Level 3
Beginning balance	$ 5,701,000	$ 5,807,000	$ 5,869,000	$ 6,071,000	$ 5,750,000	$ 1,000	$ 45,000
Total net unrealized (gains) losses included in general and administrative expense in earnings	(2,790,000)	127,000	147,000	(57,000)	321,000	(1,000)	(44,000)
Consideration issued and obligation assumed (1)				(126,000)		5,750,000
Settlements	(161,000)	(164,000)	(132,000)	(19,000)
Foreign currency translation	24,000	(69,000)	(77,000)
Ending balance	2,774,000	5,701,000	5,807,000	5,869,000	6,071,000	5,750,000	1,000
Byrne Medical Business | Price floor
Reconciliation of liability measured and recorded at fair value on a recurring basis using Level 3
Beginning balance						1,000	45,000
Total net unrealized (gains) losses included in general and administrative expense in earnings						(1,000)	(44,000)
Ending balance							1,000
Contingent Consideration | Jet Prep Ltd.
Reconciliation of liability measured and recorded at fair value on a recurring basis using Level 3
Beginning balance	2,888,000	2,804,000	2,722,000	5,026,000	4,760,000
Total net unrealized (gains) losses included in general and administrative expense in earnings	(2,159,000)	84,000	82,000	(34,000)	266,000
Consideration issued and obligation assumed (1)				(2,270,000)		4,760,000
Ending balance	729,000	2,888,000	2,804,000	2,722,000	5,026,000	4,760,000
Assumed contingent liability | Jet Prep Ltd.
Reconciliation of liability measured and recorded at fair value on a recurring basis using Level 3
Beginning balance	1,773,000	1,763,000	1,752,000	1,045,000	990,000
Total net unrealized (gains) losses included in general and administrative expense in earnings	(642,000)	10,000	11,000	(23,000)	55,000
Consideration issued and obligation assumed (1)				730,000		990,000
Ending balance	1,131,000	1,773,000	1,763,000	1,752,000	1,045,000	990,000
Contingent guaranteed obligation | Puri Core International Limited
Reconciliation of liability measured and recorded at fair value on a recurring basis using Level 3
Beginning balance	1,040,000	1,240,000	1,395,000
Total net unrealized (gains) losses included in general and administrative expense in earnings	11,000	33,000	54,000
Consideration issued and obligation assumed (1)				1,414,000
Settlements	(161,000)	(164,000)	(132,000)	(19,000)
Foreign currency translation	24,000	(69,000)	(77,000)
Ending balance	$ 914,000	$ 1,040,000	$ 1,240,000	$ 1,395,000