Acquisitions and Loss on Impairment of TLL, LLC - Additional Information (Detail) - USD ($)					1 Months Ended		3 Months Ended		12 Months Ended
	May 05, 2017	Aug. 01, 2016	May 05, 2016	Jan. 31, 2016	Jan. 31, 2017	Feb. 29, 2016	Jan. 31, 2017	May 04, 2016	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Business Acquisition [Line Items]
Payments to acquire business										$ 5,243,000	$ 11,686,000
Acquisition, goodwill identified										7,255,000
Operating loss									$ (5,410,000)	(54,146,000)	(48,199,000)
Loss on impairment					$ 500,000		$ 23,500,000			23,772,000	21,464,000
Severance and restructuring charges									$ 4,740,000	7,151,000	1,061,000
DCC Labs [Member]
Business Acquisition [Line Items]
Percentage of equity interest acquired			100.00%
Payments to acquire business, paid in shares			$ 2,640,000
Net purchase price of acquired business			7,883,000
Payments to acquire business			5,243,000
Cash held in escrow	$ 300,000		$ 500,000
Shares initially held in escrow	227,090		681,278
Business acquisition date									May 05, 2016
Acquisition, goodwill identified	$ 7,300,000
Operating loss								$ 1,200,000
Business acquisition related costs										$ 200,000
Loss on impairment		$ 23,500,000
Timeline Labs [Member]
Business Acquisition [Line Items]
Loss on impairment				$ 21,900,000							21,900,000
Contingent consideration liability, fair value				$ 0					$ 0		0
Loss on impairment due to reversal of contingent consideration liability									$ 400,000		$ 400,000
Severance and restructuring charges						$ 700,000