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Long-Term Debt and Notes Payable (Details Textual) (USD $) | 1 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 1 Months Ended
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Oct. 31, 2010 Installment | Jan. 31, 2013 | Jan. 31, 2013 Maximum [Member] | Jan. 31, 2013 Minimum [Member] | Jan. 31, 2013 Revolving Credit Facility [Member] | Jan. 31, 2013 Revolving Credit Facility [Member] Maximum [Member] | Jan. 31, 2013 Standby Letters of Credit [Member] | Jan. 31, 2013 First Victoria Bank [Member] Revolving Credit Facility [Member] | Jan. 31, 2012 First Victoria Bank [Member] Revolving Credit Facility [Member] | Aug. 31, 2012 First Victoria Bank [Member] Revolving Credit Facility [Member] | Jan. 31, 2013 First Victoria Bank [Member] Revolving Credit Facility [Member] Maximum [Member] | Jan. 31, 2013 First Victoria Bank [Member] Revolving Credit Facility [Member] Minimum [Member] | Jan. 31, 2013 First Victoria Bank [Member] Amendment to revolving credit facility [Member] | Jan. 31, 2013 First Victoria Bank [Member] Amendment to revolving credit facility [Member] Maximum [Member] | Mar. 31, 2012 Mitcham Canada ULC [Member] Installment | Mar. 31, 2010 Mitcham Canada ULC [Member] Note
Notes Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of promissory notes related to purchase |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2
Annual interest rate of promissory note | 8.00% |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.00% |
Promissory note repayable installments | 18 |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guaranty of subsidiary debt |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,000,000 |  |
Average borrowings under the revolving credit facility |  |  |  |  |  |  |  | 13,046,000 | 12,239,000 |  |  |  |  |  |  |
Limit of indebtedness |  |  |  |  |  |  |  |  |  |  | 10,000,000 |  |  |  |  |
Outstanding standby letters of credit |  |  |  |  |  |  | 622,000 |  |  |  |  |  |  |  |  |
Quarterly earnings before interest, taxes, depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 |  |  |  |
Current assets to current liabilities ratio |  |  |  | 1.0 |  |  |  |  |  |  | 1.25 |  |  |  |  |
Debt to shareholders equity ratio |  |  | 1.0 |  |  |  |  |  |  |  |  | 0.7 |  |  |  |
Available borrowings under the revolving credit facility to secure letters of credit |  |  |  |  |  | 10,000,000 |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  | 3.25% |  |  |  |  |  |  |  | 3.25% |  |  |
Interest description |  |  |  |  | Interest is payable monthly at the greater of the prime rate or 3.25%. As of January 31, 2013. |  |  |  |  |  |  |  | Interest at the prime rate, with a floor of 3.25% |  |  |
Amortization period |  |  |  |  |  |  |  | 48 months |  |  |  |  |  |  |  |
Maturity date of revolving credit facility |  |  |  |  |  |  |  |  |  |  |  |  | Aug. 31, 2015 |  |  |
Maximum borrowing amount on a revolving basis |  |  |  |  |  |  |  |  |  | 50,000,000 |  |  |  |  |  |
Long-Term Debt and Notes Payable (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collateral securities |  | The revolving credit facility and any term loan are collateralized by essentially all of the Company’s domestic assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured promissory note | $ 3,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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