Long-Term Debt and Notes Payable - Additional Information (Detail) (USD $)	0 Months Ended	9 Months Ended						9 Months Ended	0 Months Ended	9 Months Ended							9 Months Ended		9 Months Ended
	Aug. 02, 2013	Oct. 31, 2014	Oct. 31, 2014 Minimum [Member]	Oct. 31, 2014 Seamap Pte Ltd [Member]	Oct. 31, 2014 Revolving Credit Facility [Member]	Aug. 22, 2014 Revolving Credit Facility [Member]	Jan. 31, 2014 Revolving Credit Facility [Member]	Oct. 31, 2014 London Interbank Offered Rate (LIBOR) [Member]	Aug. 02, 2013 Credit Agreement [Member]	Oct. 31, 2014 Credit Agreement [Member] Maximum [Member]	Oct. 31, 2014 Credit Agreement [Member] Minimum [Member]	Oct. 31, 2014 Credit Agreement [Member] Predecessor [Member] Revolving Credit Facility And Seamap Credit Facility [Member]	Oct. 31, 2013 Credit Agreement [Member] Predecessor [Member] Revolving Credit Facility And Seamap Credit Facility [Member]	Oct. 31, 2014 Credit Agreement [Member] Base Rate [Member]	Oct. 31, 2014 Credit Agreement [Member] Eurodollar [Member]	Aug. 22, 2014 Seamap Credit Facility [Member]	Oct. 31, 2014 Term Loan [Member]	Aug. 22, 2014 Term Loan [Member]	Oct. 31, 2014 Term Loan [Member] London Interbank Offered Rate (LIBOR) [Member]	Aug. 22, 2014 Banker's Guarantee Facility [Member]
Line of Credit Facility [Line Items]
Borrowings under the revolving credit facility				$ 3,000,000		$ 3,000,000			$ 50,000,000							$ 15,000,000
Revolving credit facility expiration period									3 years
Line of credit agreement collateralized by percentage of own capital stock	65.00%
Credit Agreement basis points														175.00%	275.00%				2.75%
Commitment fee on the unused portion of the Credit Agreement										0.50%	0.375%
Available borrowings under the revolving credit facility to secure letters of credit										10,000,000
Leverage Ratio		2.00
Fixed charge coverage ratio		1.25
Adjusted EBITDA		22,000,000
Capital expenditures to adjusted EBITDA		1.0
Additional indebtedness		5,000,000
Carrying value of debt					24,500,000		22,000,000											10,000,000		2,000,000
Frequency of periodic payments																	The term portion of the Seamap Credit Facility provides for eleven quarterly principal payments of $800,000 and a final payment of the remaining $1.2 million on or before August 22, 2017.
Maturity period																	Aug. 22, 2017
Principal payment of term loan portion																	800,000
Final payment of term portion																	1,200,000
Interest rate of borrowings								3.00%
Minimum shareholder's equity		15,000,000
Minimum ratio of debt to EBITDA			125.00%
Average borrowings under the revolving credit facility												$ 24,225,000	$ 3,031,000