Note 6 - Debt (Details Textual)			9 Months Ended
Oct. 31, 2016 USD ($)	May 30, 2012 USD ($)	Oct. 31, 2016 USD ($)
Unsecured Credit Agreement [Member] \| Rabobank N.A [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate			0.75%
Unsecured Credit Agreement [Member] \| Rabobank N.A [Member]
Long-term Line of Credit	$ 0		$ 0
Line of Credit Facility, Maximum Borrowing Capacity	$ 20,000,000		$ 20,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.25%
Debt Instrument, Interest Rate, Effective Percentage	1.28%		1.28%
Liquidity on Consolidated Basis Minimum	$ 25,000,000		$ 25,000,000
Current Ratio Minimum	1.3		1.3
Leverage Ratio Maximum	1.5		1.5
Debt Service Coverage Ratio, Minimum	1.5		1.5
2012 Mortgage [Member] \| Rabobank N.A [Member] \| Quad Ortega Hill LLC [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate		2.25%
2012 Mortgage [Member] \| Rabobank N.A [Member] \| Quad Ortega Hill LLC [Member] \| Swap [Member]
Derivative Liability, Notional Amount		$ 16,100,000
Derivative, Fixed Interest Rate		4.31%
2012 Mortgage [Member] \| Rabobank N.A [Member] \| Quad Ortega Hill LLC [Member]
Debt Instrument, Face Amount		$ 16,100,000
Debt Instrument, Periodic Payment		88,100
Final Principal Payment		$ 11,700,000
2012 Mortgage [Member] \| Quad Ortega Hill LLC [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	0.53%
2012 Mortgage [Member] \| Quad Ortega Hill LLC [Member]
Loans Payable to Bank	$ 14,400,000		$ 14,400,000

The minimum current ratio as of the balance sheet date under the terms of the debt covenants.

No definition available.

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- Definition

The minimum debt service coverage ratio as of the balance sheet date under the terms of the debt covenants.

+ References

No definition available.

+ Details

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- Definition

The required amount due as a lump sum payment on final maturity date.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

The maximum leverage as of the balance sheet date under the terms of the debt covenants.

+ References

No definition available.

+ Details

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- Definition

The minimum liquidity on a consolidated basis as of the balance sheet date under the terms of the debt covenants.

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

+ Details

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- Definition

Amount of the required periodic payments including both interest and principal payments.

+ References

+ Details

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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- Definition

Nominal or face amount used to calculate payments on the derivative liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Notional Amount
-URI http://asc.fasb.org/extlink&oid=6519104

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-Publisher FASB
-Name Accounting Standards Codification
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-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579245-113959

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Name Accounting Standards Codification
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-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of loans from a bank with maturities initially due after one year or beyond the normal operating cycle if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16)(a))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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- Details

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