Goodwill, Long-lived Assets and Other Intangibles Long-lived Assets and Other Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016	Jan. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Long-lived asset impairment loss	$ 0	$ 0	$ 259	$ 0
Finite-Lived Intangible Assets, Gross	24,547	24,539	24,547	24,539	$ 24,501
Finite-Lived Intangible Assets, Accumulated Amortization	(13,319)	(11,651)	(13,319)	(11,651)	(12,453)
Finite-Lived Intangible Assets, Net	11,228	12,888	11,228	12,888	12,048
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	7,230	7,175	7,230	7,175	7,136
Finite-Lived Intangible Assets, Accumulated Amortization	(6,775)	(6,423)	(6,775)	(6,423)	(6,553)
Finite-Lived Intangible Assets, Net	455	752	455	752	583
Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	12,787	13,012	12,787	13,012	12,987
Finite-Lived Intangible Assets, Accumulated Amortization	(4,206)	(3,160)	(4,206)	(3,160)	(3,680)
Finite-Lived Intangible Assets, Net	8,581	9,852	8,581	9,852	9,307
Patents and Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	4,530	4,352	4,530	4,352	4,378
Finite-Lived Intangible Assets, Accumulated Amortization	(2,338)	(2,068)	(2,338)	(2,068)	(2,220)
Finite-Lived Intangible Assets, Net	2,192	2,284	2,192	2,284	$ 2,158
Other Nonoperating Income (Expense) [Member] | AgEagle Aerial Systems [Member] | Applied Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Equity Method Investment, Other than Temporary Impairment	0	0	72	0
Operating Income (Loss) [Member] | AgEagle Aerial Systems [Member] | Customer-Related Intangible Assets [Member] | Applied Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Long-lived asset impairment loss	$ 0	$ 0	$ 259	$ 0