Goodwill, Long-lived Assets and Other Intangibles Long-lived Assets and Other Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Jan. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Long-lived asset impairment loss	$ 0	$ 259
Finite-Lived Intangible Assets, Gross	24,762		$ 24,795
Finite-Lived Intangible Assets, Accumulated Amortization	(14,947)		(14,211)
Finite-Lived Intangible Assets, Net	9,815		10,584
Technology-Based Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	7,260		7,290
Finite-Lived Intangible Assets, Accumulated Amortization	(7,046)		(6,996)
Finite-Lived Intangible Assets, Net	214		294
Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	13,245		13,264
Finite-Lived Intangible Assets, Accumulated Amortization	(5,400)		(4,834)
Finite-Lived Intangible Assets, Net	7,845		8,430
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	4,257		4,241
Finite-Lived Intangible Assets, Accumulated Amortization	(2,501)		(2,381)
Finite-Lived Intangible Assets, Net	1,756		$ 1,860
AgEagle Aerial Systems [Member] | Applied Technology [Member] | Other Nonoperating Income (Expense) [Member]
Finite-Lived Intangible Assets [Line Items]
Equity Method Investment, Other than Temporary Impairment	0	72
AgEagle Aerial Systems [Member] | Applied Technology [Member] | Customer-Related Intangible Assets [Member] | Operating Income (Loss) [Member]
Finite-Lived Intangible Assets [Line Items]
Long-lived asset impairment loss	$ 0	$ 259